The rights of a Muslim to the Muslim are six. It was said: what are they, Messenger of Allah (saws)? When you meet him, salute him; when he calls you, respond to him; when he seeks counsel, give him advice, when he sneezes and praises Allah, say to him, Allah has mercy on you; when he is sick, visit him; and when he dies follow his funeral (Muslim narrated it.)

On the authority of Ibn Umar (radi'allahu anhu) that he heard the Messenger of Allah (saws) saying: The Muslim is a brother of a Muslim, he should neither oppress him nor disgrace him. That who cares for his brother's need Allah will care for him. Allah will alleviate one of his sufferings on the Day of Resurrection; and that who veils a Muslim, Allah will veil him on the Resurrection Day. (Agreed upon.)

On the authority of Abu Huraira (radi'allahu anhu) who narrated that the Messenger of Allah (saws) had said: That who removes the suffering of a believer out of the sufferings of the  world, Allah will relieve him from his sufferings on the Day of Resurrection. And that who pared way for that who is insolvent, Allah will make things easy for him in the Hereafter, and that who veils the faults of a Muslim, Allah will veil his faults in the world, and in the Hereafter. Allah supports His servant as long as the servant is at the back of his brother, and that who treads the path in search of knowledge, Allah will make that path easy, leading to Paradise for him and those people who assemble in the House among the houses of Allah and recite the Book of Allah and they learn and teach the Holy Qur'an, there descend upon them the tranquility and mercy will cover them and the angels will flock around them in the presence of those near him and that who lags behind, doing good deeds, his (high descent does not make him go ahead.) (It was reported by Muslim.)

On the authority of Abu Sa'id Al-Khudri (raa): While we were on a journey with the Messenger of Allah (saws) a man came riding his mount and began turning his eyes right and left. He said:  Whosoever has more than one mount should offer it to him who is without it; and whosoever has surplus of food should give it to him who has nothing, and he continued specifying all sorts of provision till we thought that none of us has had any excellence to the others. (Reported by Muslim.)

On the authority of Al-Bara (raa) who reported that the Messenger of Allah (saws) had said: Two Muslims will not meet and shake hands without having their sins forgiven before they separate. (Reported by Abu Dawud.)

Ammar bin Yasir (raa) said: 'Three qualities! Whoever acquires them then he has acquired faith: the quality of exacting justice from one's self, and to offer As-Salam to the world, and to spend [give charitable gifts in Allah's cause] in spite of a barely sufficient sustenance [poverty].' (Reported by Muslim.)

On the authority of Abu Haraira (raa) that the Messenger of Allah (saws) had said: Verily, Allah will say on the Day of Resurrection: O! Son of Adam, I was sick and you did not visit me. He replied: My Lord! How could I visit Thee when you are the Lord of the Worlds? Allah would say: Didn't you know that such and such servant was sick, and you did not visit him? Did not you realize that if you had visited him you would have found me with him? O! Son of Adam, I asked you for food but you did not feed me. He replied: O! Lord, how could I feed Thee when you are the Lord of the worlds? Allah would say: Did not you know that such and such servant was hungry? Did not you realize that if you had fed him, you would have found that with Me  (as a reward)? O! Son of Adam, I asked water of you but you did not give Me water. He would reply: My Lord, how could I provide you with water, and you are the Lord of the worlds?" Allah would say: My servant so and so asked water of you but you did not give him a drink. Did not you behold that if you had given him water you would have found that with Me (as a reward). (Reported by Muslim.)

On the authority of Anas bin Malik (raa) who reported that Allah's Messenger (saws) had said: Neither nurse mutual hatred, nor jealousy, nor enmity and be fellow brothers and servants of Allah. It is not lawful for a Muslim that he should abandon relations estranged with his brother beyond three days. (Agreed upon)

On the authority of Abu Huraira (raa) who reported that Allah's messenger (saws) had said: The gates of Paradise are not opened but on two days: Monday and Thursday, and then every servant (of Allah) is granted forgiveness that does not associate anything with Allah but the person whose heart is filled with rancor against his brother. It is said twice; hold both of them until there is reconciliation. (Reported by Muslim.)