Sahih al-Bukhari Book 46, Hadith 20
The Prophet (ﷺ) said, "Whoever has (the following) four characters will be a hypocrite, and whoever has
one of the following four characteristics will have one characteristic of hypocrisy until he gives it up.
These are: (1 ) Whenever he talks, he tells a lie; (2) whenever he makes a promise, he breaks it; (3)
whenever he makes a covenant he proves treacherous; (4) and whenever he quarrels, he behaves
impudently in an evil insulting manner." (See Hadith No. 33 Vol. 1)
(the wife of the Prophet) Allah's Messenger (ﷺ) heard some people quarreling at the door of his dwelling. He came out and said, "I am only a human being, and opponents come to me (to settle their problems); maybe someone amongst you can present his case more eloquently than the other, whereby I may consider him true and give a verdict in his favor. So, If I give the right of a Muslim to another by mistake, then it is really a portion of (Hell) Fire, he has the option to take or give up (before the Day of Resurrection).
Hind bint `Utba (Abu Sufyan's wife) came and said, "O Allah's Messenger (ﷺ)! Abu Sufyan is a miser. Is there any harm if I spend something from his property for our children?" He said, there is no harm for you if you feed them from it justly and reasonably (with no extravagance).