Some slaves (of the unbelievers) went out to the Messenger of Allah (ﷺ) on the day of al-Hudaybiyyah before treaty. Their masters wrote to him saying: O Muhammad, they have not gone out to you with an interest in your religion, but they have gone out to escape from slavery. Some people said: They have spoken the truth, Messenger of Allah, send them back to them. The Messenger of Allah (ﷺ) became angry and said: I do not see your restraining yourself from this action), group of Quraysh, but that Allah send someone to you who strike your necks. He then refused to return them, and said: They are emancipated (slaves) of Allah, the Exalted.
When the Messenger of Allah (ﷺ) died, the wives of the Prophet (ﷺ) intended to send ‘Uthman b. ‘Affan to Abu Bakr to ask him their cost of living from (the inheritance of) the Prophet (ﷺ). Thereupon ‘Aishah said: Did not the Messenger of Allah (ﷺ) say: We are not inherited. Whatever we leave is sadaqah.
When the Messenger of Allah (ﷺ) swore an oath, it was: No, and I beg forgiveness of Allah.
The Prophet (ﷺ) said: If anyone seeks the office of judge among Muslims till he gets it and his justice prevails over his tyranny, he will go to Paradise; but the man whose tyranny prevails over his justice will go to Hell.