✦⋆· The Prophet (saw) said, "Man follows the same creed as his friend, so consider carefully who you befriend."

● "The most prosperous of people is he who mingles with honourable people."

✦⋆· Imam Ali (as) said, "Friends are a single soul divided between different bodies."

● "Souls resemble other souls, and those that resemble each other are in harmony, that is why people are attracted towards those they resemble."

● "One who aids you in your obedience [to Allah] is the best of companions."

● "A friend cannot be considered a friend unless he is tested on three occasions: in time of need, behind your back and after your death."

● "If a friend envies you, then he is not a true friend."

● "The most goodness and righteousness is to be found in the company of people of reason and understanding."

● "The one who invites you to the everlasting abode and helps you work towards it is a compassionate friend indeed."

● "He who, in his friendship with you, is of no aid to you against your base self, his friendship is a curse on you, if only you knew."

● "Beware of befriending corrupt people, immoral people, and those who openly commit acts of disobedience to Allah."

● "The friend of an ignorant man is always wearied and miserable."

● "Beware of befriending immoral people, for verily only evil accompanies evil."

● "When a man puts his friend to shame, he has indeed parted from him."

● "Jealousy of one's friend stems from weakness in one's love [for him]."

● "He who penetrates deeply into his friend's affairs, his love for him comes to an end."

● "He who argues with his brothers has few friends."

● "A sincere friend is he who advises you with regard to your shortcomings, protects you in your absence, and prefers you over himself."

● "Shower all your love on your friend but do not shower all your trust on him."

● "Unfortunate is he who cannot gain a few sincere friends during his life and more unfortunate is the one who has gained them and then lost them (through his deeds)."

● "He who is deserted by friends and relatives will often find help and sympathy from strangers."

● "Lack of friends means, stranger in one's own country."

✦⋆· Imam Zayn al-Abidin (as), in his advice to his son Imam Baqir (as) said, "Beware of befriending one who has cut off relations with his kin, for verily I have seen him cursed in the Book of Allah, Mighty and Exalted, on three different occasions."

● "The right of your companion is that you share his company with bounty and fairness. You should honour him as he honours you, and should not let him be the first to extend his generosity. And if he is the first to do so, then repay him. Wish for him as he wishes for you, and restrain him from any act of disobedience that he might contemplate. Be a mercy for him, and not a chastisement."

✦⋆· Imam Sadiq (as) said, "Do not call a man your friend with the true stamp of friendship until you have tested him in three matters: anger him so that you may see whether his anger takes him away from right into wrong; test him with the dinar and the dirham [in money matters]; and travel with him."

● "If you want the exclusive love of your brother, then do not ever make fun of him, nor quarrel with him, nor compete against him, nor be malicious to him."

● "Friendship can only succeed when its conditions are fulfilled, and he who fulfils all or some of these conditions may be befriended, and if not, then do not attribute any of your friendship to him. The first of these conditions is that he should treat you in public the same as he treats you in private. Secondly, that your source of pride is a source of pride for him, and your source of shame is a source of shame for him too. Thirdly, that neither friendship [with others] nor wealth should render him envious of you. Fourthly, that he must not prevent you from obtaining that which you have the capacity for, and fifthly - and this sums up all the other qualities - that he must not give up on you in times of misfortune."

✦⋆· Imam Hadi (as) said,"The quarrel corrupts a long friendship and dissolves strong ties, because it only really consists of strife, and strife is the main cause of breaking a friendship."