“O believers, when the proclamation is made for prayer on the Day of Congregation (Friday), hasten to God's remembrance and leave trafficking aside. That is better for you did you but know.” (62:9)  
What do you think as you see a crowd of people gathered in one place, in regular rows? Acting altogether, simultaneously and in a well-organized manner? And they are dressed beautifully and smell good? Especially when they are hundreds and thousands? I see this as a glorious union. You can find this kind of forgathering in a Friday prayer. 

Congregations in Islam

Islam emphasizes three congregations: Haj which is held annually in a large scale, weekly Friday prayers and daily congregational prayers. Hajj is God’s plan to bring huge amounts of people together in Mecca, to show the power of Islam and unite the Muslims; besides its specific spirituality. Imam Baghir (AS), the fifth Imam, mentions Hajj as one of the five bases on which Islam is founded. [1]
Friday prayer is of such high importance and value that when a person said to Prophet Muhammad (PBUH&HP) that he has got ready several times to go to Hajj but has not managed to, our prophet (PBUH) told him to attend Friday prayer which is Hajj of the poor. [2]

These show that Friday prayer has many characteristics of Hajj and can be influential in the same way, on a smaller scale though.

Friday

In several narrations from the last prophet (PBUH&HP) and his household, Friday is known as the best night and day of the week. It is recommended to perform full ablution (qusl), wear your best clothes, cut nails, brush your hair and beard, trim mustaches and wear perfume on this day. One of the main reasons for these recommendations is getting ready to show up among Muslims in Friday prayer.

Friday prayer (Salat al-Jumu’ah)

Friday prayer (Salat al-Jumu’ah) is an Islamic ritual. It begins with two khutbahs (orations) by Imam al-Jumu’ah in which he advises people toward observing virtue. In the first one, he elaborates on religious concepts. In the second one, he discusses political and social matters of Muslims’ community. 

Then Friday prayer is performed in congregation. It consists of two rak’ahs (parts). Each rak’ah has a qunut (raising hands); in the first rak’ah before ruku’ (bowing), in the second one after ruku’. Friday prayer and the two orations before that are a substitution to the four-rak’ah Salat al-Zuhr. After that, a four-rak’ah Salat al-Asr is performed. Please note that:

- Friday prayer cannot be performed individually.    

- Except for the Imam, there should be at least four people for a Friday prayer to be held. [3]

Friday prayer; obligatory or recommended?

Prophet Muhammad (PBUH&HP) says: “Surely God-may be blessed and exalted- made Friday prayer obligatory for you. If someone abandons it in my life or after my death, aiming to belittle or deny it, God will distress them and won’t bless them in their work; and know! their prayer is not accepted, and know! their alms-tax (Zakat) is not accepted; and know! their Haj is not accepted; and know! their good deed is not accepted until they repent.” [4]

In an ordinary situation, i.e. the presence of innocent Imam, Friday prayer is a determinate duty. That is the same duty should be done and it cannot be replaced by another one. But now that the twelfth and last Imam, Mahdi (AS) is absent, Friday prayer is a selective duty. Which means you can choose between performing Friday prayer or Salat al-Zuhr. [5]

Yet, considering its profits, Muslims should pay special attention to Friday prayer. 

Why Is Friday Prayer Highly Recommended? 

Imam Reza (AS), the eighth Imam, states the importance of Friday Prayer and its Khutbahs comprehensively: “Because Friday is a public rendezvous, khutbah on Friday has been arranged to be a means for governor to advise people and to encourage them to obedience and to warn them of disobedience and to inform them of God’s will about their interest of religion and world and let them know of what has happened to them in the world and of events in which they have disadvantage or advantage.”[6]

Reason of Repetition

- We are forgetful beings. We need to be advised repeatedly so that we may not neglect the afterlife, miss the path, and forget necessities of the society.

- See these daily and weekly prayers as the stages of a ladder. By each prayer, we should take a step upwards. By praying, we are communicating with God and by practicing in a regular program, we can enhance the quality of this communication.

References:

1. Al-Kafi, v.2, p.18
2. Wassail al-Shi'a, v.7, p.300
3. Khamenei.ir
4. Wassail al-Shi'a, v.7, p.302 
5. Khamenei.ir 
6. Wassail al-Shi'a, v.7, p.344

Human beings by nature are social creatures, in need of companions and friends. Most of our lives depend on interactions with others, and man is therefore compelled to live in society and with other individuals. Friendship in Islam is considered one of the Divine blessings through which one overcomes loneliness and solitude.

Islam has placed tremendous importance on sociability and friendship. In the Quran [i], great emphasis has been placed on the concept of friendship because maintaining good company plays a pivotal role in shaping the life of the individual and it influences the path that will be chosen in life. Likewise, the Holy Prophet (PBUH&HP) and his Ahl al-Bayt (AS) on different occasions had clearly stated its importance, criteria for choosing a friend, characteristics of a good friend and the rights of a friend [1].

Friendship in Islam

Friends are an integral and important part of our social life as they contribute greatly to the development of one’s personality and they affect many aspects of our lives. Islam, in complete harmony with man’s nature, deals extensively both in the Quran and the narrations (Hadiths) of Prophet Muhammad (PBUH&HP) with the issue of friendship in Islam.

In the Quran, Allah says:

“On that day, friends will be one another’s enemies, except for the Godwary.” (43:67)

The Holy Prophet (PBUH&HP) while explaining the impact of friends says:

“Man is influenced by the faith of his friends. Therefore, be careful of whom you befriend.”[2]

Similarly, the commander of the faithful; Imam Ali (AS) says:

“Try to have as many as possible true friends, for they are the supplies in joy and the shelters in misfortunes” [3]

Choosing a Friend

Islam attaches great emphasis on the choice of a friend to be selected in life. For this purpose, it is expected that one should employ his/her judgment in a manner free from emotion and try to set aside the criterion for assessing his/her real worth. “One must know his/her inadequacies and weak points, his/her ideas, feelings, dislikes and infirmities. Ultimately, one must discover the human merits and desirable qualities that he/she carries in the depth of his/her spirit so that one may benefit from his/her outstanding virtues.”[4]

Therefore, for the great good or bad influences friends can have on the characters and personality of each other, it is important for every man of reason to choose friends that are characterized by good mannerism and behavior.

Meanwhile, in accordance with the sayings of the Prophet (PBUH&HP) and his Ahl al-Bayt (AS), a Muslim must avoid certain sets of people as friends: transgressor, hypocrites, foolish, liar, sinful, stingy, and disregardful to his/her relatives. Similarly, non-Muslims should not be taken as intimate friends or allies [5].

However, there is no hindrance for a boy having a girl as a friend or vice versa, so far as the Islamic regulations (such as the Islamic Hijab, avoidance of indiscriminate touching, etc.) are observed and they avoid any sinful act.

Characteristics of a Good Friend

In Islam, the followings are some of the characteristics to be looked forward to in a friend:

Intelligence
Faith
Honesty
Uprightness and well mannerism

Rights of a Friend

Following some narrations (Hadiths) [6], friendship entails certain trusts and duties. The one who observes them is a true friend while one who breach them is unworthy of friendship in Islam. Here are some of the rights of friends:

Respecting them and their personality [7]
Rendering material supports in the time of need [8]
Advising them when they need your advice [9]
Forgiving their shortcomings [10]
Concealing their lapses and faults from others [11]
Visiting them when they are sick [12]
Participating in their funeral when they die[13]

Conclusion

Concisely, friends are integral parts of our social life, and it is important to be selective in the choice of companions and friends. The righteous ones who lead one to righteousness in this world and prosperity in the Hereafter should be considered as friends. 

In contrast, hypocrites and ill-mannered individuals who are sources of plights in this world and in the Hereafter should not be taken as friends. Similarly, Islam teaches the Muslims to observe certain matters in friendly relations. This is because immoderation in this regard may lead to deplorable consequences and bring regret and pain.

Notes:

[i] (9: 71), (25: 27-29), etc.

References:

1. Al-Amidi, Ghurar al-Hikam, P. 177; Mustadrak Wasa’il, Vol. 5, chapter 42
2. Allamah Majlisi, Bihar al-Anwar, Vol. 74, P. 192.
3. Mahdi as-Sadr, The Ahlul-Bayt; Ethical role models, P. 290.
4. Mujtaba Musavi Lari, Ethics and Spiritual growth, P. 211.
5. (3: 28); (4: 144); (5: 51); (9: 23) etc.
6. Imam Ali Zayn al-Abideen, Treatise on Rights, Right 33 (The right of the companion)
7. Ibid
8. Kulayni, Al-Kafi, Vol. 2, P. 198, Hadith No: 8.
9. Al-Amidi, Ghurar al-Hikam, P. 775
10. Ibid
11. Ibid, P. 707
12. Allamah Majlisi, Bihar al-Anwar, Vol. 16, P. 233, Hadith 35
13. Kulayni, Al-Kafi, Vol. 3, P. 173.