Sayyiduna Iyad (may Allah be pleased with him) says that before accepting Islam, while I was still an opponent of the Messenger of Allah (peace and blessings of Allah be upon him), I gave a she-camel to him as a gift, but he did not accept it, and said: "I dislike the gift of polytheists."

It is narrated from Sayyiduna Sa'd bin Malik (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) said: "Abusing a Muslim is wickedness and a sin."

It is narrated from Sayyiduna Anas (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) was neither indecent in speech, nor one who cursed, nor one who abused. Rather, when he became angry, he would (only) say: "What is the matter with him, may his forehead be dust-covered."

It is narrated from Sayyiduna Abdullah (may Allah be pleased with him) that it is reported from the Prophet (peace and blessings of Allah be upon him): "Abusing a Muslim is a sin, and fighting him is disbelief."

It is narrated from Sayyiduna Abu Dharr (may Allah be pleased with him), he says: I heard the Prophet (peace and blessings of Allah be upon him) say: "When a man calls another man a disbeliever or a sinner, and he is not so, then this (statement) returns upon him (and he becomes as such)."

With this chain of narration, it is reported from Sayyiduna Abu Dharr (may Allah be pleased with him) that he heard the Prophet (peace and blessings of Allah be upon him) say: "Whoever knowingly claims someone other than his father as his father, he has committed disbelief (kufr) (with Allah). Similarly, whoever claims to belong to a people while he is not one of them, he should take his place in the Fire. And whoever calls a man a disbeliever (kafir) or says, 'O enemy of Allah,' while he is not so, then its consequence will return upon the one who said it."

It is narrated from Sayyiduna Sulaiman bin Surad (may Allah be pleased with him), who was a companion of the Prophet (peace and blessings be upon him), that two men quarreled in the presence of the Prophet (peace and blessings be upon him). One of them became angry, and his anger was so intense that the expression on his face changed and he swelled up. Then the Prophet (peace and blessings be upon him) said: "I know a word; if this person were to say it, surely his anger would go away." So a man (Sayyiduna Mu'adh, may Allah be pleased with him) went to him and told him what the Prophet (peace and blessings be upon him) had said, and said: Seek refuge with Allah from the evil of the accursed devil. The man replied: Do you think I am sick? Am I mad? Go away.

It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him), he said: There is a veil from Allah between every two Muslims. When one of them speaks abusively, he tears the veil of Allah. And when one of them says to the other, "You are a disbeliever," then one of them becomes a disbeliever.

It is narrated from Sayyidah Aisha (may Allah be pleased with her) that the Prophet (peace and blessings of Allah be upon him) did something and also permitted the people to do it, but some people refrained from it. When the Prophet (peace and blessings of Allah be upon him) came to know of this, he delivered a sermon and after praising Allah, he said: "What is the matter with those people who refrain from doing something that I have done? By Allah! I have more knowledge of Allah than they do, and I fear Allah more than they do."

It is narrated from Sayyiduna Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) would very rarely directly confront someone face to face if he saw them involved in something impermissible. One day, a man came and there were traces of yellow color on him. When he left, the Prophet (peace and blessings be upon him) said: "If he would change or remove that yellow (garment), it would be better."