The Messenger of Allah [SAW] said: "Whoever seizes the wealth of a Muslim unlawfully by means of his (false) oath, Allah makes the Fire required for him, Paradise unlawful for him." A man said to him: "O Messenger of Allah, even if it is something small?" He said: "Even if it is a twig of an Arak tree."
"Hind came to the Messenger of Allah [SAW] and said : 'O Messenger of Allah, Abu Sufyan is a stingy man who does not spend enough on my child and I. Can I take from his wealth without him realizing?' He said: 'Take what is sufficient for you and your child on a reasonable basis.'"
"Abu Bakrah wrote to me, saying: 'I heard the Messenger of Allah [SAW] say: No one should pass two judgments on one issue, and no one should pass judgment between two disputing parties while he is angry.'"
"The Messenger of Allah [SAW] said: 'You refer your disputes to me, but I am only human. And some of you may be more eloquent in arguing their case than others, and I may pass judgment on the basis of what I hear. If I pass judgment in favor of one of you against his brother's rights, then it is a piece of the fire that I am giving him.'"
That two men referred a dispute to the Prophet [SAW] concerning an animal, and neither of them had any evidence, so he ruled that it be shared equally between them.
"There were two female neighbors who used to do leatherwork (with an awl) in At-Ta'if. One of them came out with her hand bleeding and claimed that her companion had injured her, but the other one denied it. I wrote to Ibn 'Abbas concerning that. He wrote, (saying) that the Messenger of Allah [SAW] ruled that the person against whom the claim was made should swear an oath. For if people were to be given what they claimed was theirs, then people would make claims against the wealth and blood of others." So he called her and recited this Verse to her: "Verily, those who purchase a small gain at the cost of Allah's Covenant and their oaths, they shall have no portion in the Hereafter..." until the end of the Verse. He called her and recited that to her, and she confessed to that. News of that reached him and he was happy.
"Mu'awiyah, (may Allah be pleased with him,) said: 'The Messenger of Allah [SAW] went out to a circle - meaning, of his Companions - and said: 'What are you doing?' They said: 'We have come together to pray to Allah and praise Him for guiding us to His religion, and blessing us with you.' He said: 'I ask you, by Allah, is that the only reason?' They said: 'By Allah, we have not come together for any other reason.' He said: 'I am not asking you to swear to an oath because of any suspicion; rather Jibril came to me and told me that Allah, the Mighty and Sublime, is boasting of you to the angels.'"
"The Messenger of Allah [SAW] said: 'Isa bin Mariam, peace be upon him, saw a man stealing, and said to him: Are you stealing? He said: No, by Allah besides Whom there is no other God! 'Isa, peace be upon him, said: I believe in Allah and I disbelieve my eyes.'"