Sayyiduna Jarir bin Abdullah (may Allah be pleased with him) narrated that I pledged allegiance to the Messenger of Allah (peace and blessings be upon him) on hearing and obeying, so he instructed me to the extent of my ability, and also to pledge allegiance on wishing well for every Muslim.

Sayyiduna Abu Hurairah (may Allah be pleased with him) said that the Noble Prophet (peace and blessings be upon him) said: When a person commits adultery, at the very moment of committing adultery, he is not a believer; similarly, when someone drinks wine, at the very moment of drinking wine, he is not a believer; likewise, when a thief steals, at that time he is not a believer. And in one narration there is an addition: If a person (in broad daylight) commits robbery on someone's property in such a way that people are watching, he does not commit this looting while remaining a believer.

Sayyiduna Abdullah bin Amr (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: Whoever possesses four habits is a pure hypocrite, and whoever has one of these four habits has a trait of hypocrisy until he gives it up: when he is entrusted, he betrays the trust; when he speaks, he lies; when he makes a promise, he breaks it; and when he quarrels, he abuses.

Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: The signs of a hypocrite are three: when he speaks, he lies; when he makes a promise, he breaks it; and when he is entrusted, he betrays the trust.

Sayyiduna Abdullah bin Umar (may Allah be pleased with them) narrates that the Messenger of Allah (peace and blessings be upon him) said: Whoever calls his brother a disbeliever (kafir), then one of the two becomes a disbeliever.

Sayyiduna Abu Dharr (may Allah be pleased with him) reports that the Noble Prophet (peace and blessings be upon him) said: Whoever knowingly claims someone other than his father as his father, he has committed disbelief; and whoever associates his lineage with a people to whom he has no (blood) relation, then he should take his place in Hell.

Sayyiduna Abu Hurairah (may Allah be pleased with him) narrated that the Prophet Muhammad (peace and blessings be upon him) said: "Let none of you deny his father, for whoever turns away from his father (and claims to be the son of another), this is disbelief."

Sayyiduna Sa’d (may Allah be pleased with him) narrated that I heard the Prophet (peace and blessings of Allah be upon him) say: Whoever claims to be the son of anyone other than his (real) father, knowing that he is not his father, then Paradise is forbidden for him. Then this hadith was mentioned to Sayyiduna Abu Bakrah (may Allah be pleased with him), so he said: Both my ears heard this hadith from the Prophet (peace and blessings of Allah be upon him), and my heart has preserved it.

Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) narrated that the Prophet Muhammad (peace and blessings be upon him) said: To abuse a Muslim is wickedness, and to fight him is disbelief.

Sayyiduna Jarir (may Allah be pleased with him) narrated that the Noble Prophet (peace and blessings be upon him) said to him during the Farewell Pilgrimage: "Make the people completely silent (so that they may listen attentively)." Then he said, "O people! Do not turn into disbelievers after me, striking the necks of one another."