The Messenger of Allah (ﷺ) said, "He who takes up arms against us is none of us; and he who cheats us is none of us."[Muslim].Another narration of Muslim is: The Messenger of Allah (ﷺ) happened to pass by a heap of corn. He thrust his hand in that (heap) and his fingers felt wetness. He said to the owner of that heap of corn, "What is this?" He replied: "O Messenger of Allah! These have been drenched by rainfall." He remarked, "Why did you not place this (the drenched part of the heap) over the corn so that people might see it? He who deceives is not of us."

The Messenger of Allah (ﷺ) said, "Do not practise Najsh (to cheat)."[Muslim].

The Messenger of Allah (ﷺ) prohibited the practice of Najsh.[Al-Bukhari and Muslim].

The Prophet (ﷺ) said, "Every one who breaks a covenant will have a flag by his buttocks on the Day of Resurrection. It will be raised higher according to the nature of his breach. Behold, there will be no greater a sin with respect to breaking the covenant than that of a ruler who breaks his covenant with the Muslim masses."[Muslim].

The Messenger of Allah (ﷺ) said, "Do not desert (stop talking to) one another, do not nurse hatred towards one another, do not be jealous of one another, and become as fellow brothers and slaves of Allah. It is not lawful for a Muslim to stop talking to his brother (Muslim) for more than three days."[Al-Bukhari and Muslim]

The Messenger of Allah (ﷺ) said, "People's deeds are presented before Allah on Mondays and Thursdays, and then every slave (of Allah) is granted forgiveness (of minor sins) if he does not associate anything with Allah in worship. But the person in whose heart there is rancour against his brother, will not be pardoned. With regard to them, it is said twice: 'Hold these two until they are reconciled'."[Muslim].

I heard the Messenger of Allah (ﷺ) as saying, "The Satan has despaired of being worshipped by those who engage in prayer in the Arabian Peninsula but (has not lost hope) in creating dissension among them."[Muslim].

the Messenger of Allah (ﷺ) said, "In the presence of three people, two should not hold secret counsel, to the exclusion of the third."[Al- Bukhari and Muslim].In Abu Dawud, Abu Salih related: I asked Ibn 'Umar: "What if there are four people." He said, "There is no harm in that."Malik reported in Al-Muwatta that 'Abdullah bin Dinar related: Ibn 'Umar and I were together in Khalid bin 'Uqbah's house which was situated in the market place. A man came to consult Ibn 'Umar. None besides me was present. Ibn 'Umar called another man in and we became four and said to me and the man he had called: Move away a bit because I have heard the Messenger of Allah (ﷺ) saying, "The two people should not hold secret counsel together excluding the third."

I happened to pass by some lads of the Quraish who had tied a bird at which they have been shooting arrows. Every arrow that they missed came into the possession of the owner of the bird. No sooner had they seen Ibn 'Umar, they dispersed. Thereupon, Ibn 'Umar said: "Who has done this? May Allah curse him who has done so. Verily, the Messenger of Allah (ﷺ) has cursed anyone who makes a live thing the target (of one's marksmanship)."[Al-Bukhari and Muslim].

The Messenger of Allah (ﷺ) sent us on an expedition and said to us, "If you find so- and-so (he named two persons belonging to the Quraish) commit them to the fire." When we were on the verge of departure, he said to us, "I ordered you to burn so-and-so, but it is Allah Alone Who punishes with the fire. So if you find them put them to death."[Al- Bukhari].

The Messenger of Allah (ﷺ) said, "A man must not look at a man's private parts nor must a woman look at a woman's private parts; neither should two men lie naked under one cover, nor should two women lie naked under the same cover."[Muslim].

The Messenger of Allah (ﷺ) said, "The sanctity of the wives of Mujahidun (i.e., those who strive hard and fight in the way of Allah) for those who remain at home (i.e., those who do not go to the battlefield to fight Jihad) is like the sanctity of their own mothers. Anyone who remains behind to look after the family of a Mujahid and betrays his trust, will be made to stand on the Day of Resurrection before the Mujahid who will take away from his meritorious deeds whatever he likes till he is satisfied." The Messenger of Allah (ﷺ) turned toward us and said, "Now, what do you think (i.e., will he leave anything with him)?"[Muslim].

The Messenger of Allah (ﷺ) cursed a man who puts on the dress of women, and a woman who puts on the dress of men.[Abu Dawud].

I heard the Messenger of Allah (ﷺ) as saying: "Jews and Christians do not dye their hair, so act differently from them."[Al-Bukhari and Muslim].

The Messenger of Allah (ﷺ) saw a boy, some portion of whose head was shaved and some of it was left out. He prohibited them from that and said, "Shave the whole of it or leave the whole of it."[Muslim].

The Prophet (ﷺ) said, "It is enough for a man to prove himself a liar when he goes on narrating whatever he hears."[Muslim].

The Messenger of Allah (ﷺ) said, "Shall I not inform you of one of the gravest of the cardinal sins?" We said: "Yes, O Messenger of Allah!" He (ﷺ) said, "To join others as partners with Allah in worship and to be undutiful to one's parents." The Messenger of Allah (ﷺ) sat up from his reclining position (in order to stress the importance of what he was going to say) and added, "I warn you making a false statement and giving a false testimony. I warn you against making a false statement and giving a false testimony." The Messenger of Allah (ﷺ) kept on repeating this (warning) till we wished he should stop.[Al- Bukhari and Muslim]

The Messenger of Allah (ﷺ) said: "It does not befit a Siddiq (righteous Muslim) to frequently curse others."[Muslim]

The Messenger of Allah (ﷺ) said, "A true believer is not involved in taunting, or frequently cursing (others) or in indecency or abusing."[At-Tirmidhi].

The Messenger of Allah (ﷺ) said, "When a person curses somebody or something, the curse goes up to heaven and the gates of heaven get closed. Then it comes down to the earth and its gates get closed. Then it turns right and left, and if it does not find an entrance to go anywhere, it returns to the person or thing that was cursed; if he or it deserves to be cursed; otherwise it returns to the person who uttered it."[Abu Dawud].