Book 31, Hadith 10

An-Nu'man bin Bashir Al-Ansari narrated that his mother, the daughter of Rawahah, asked his father to give some of his wealth to her son. He deferred that for a year, then he decided to give it to him. She said:"I will not be pleased until you ask the Messenger of Allah to bear witness." He said: "O Messenger of Allah, the mother of this boy, the daughter of Rawahah, insisted that I give a gift to him." The Messenger of Allah said: "O Bashir, do you have any other children besides this one?" He said: "Yes." The Messenger of Allah said: "Have you given all of them a gift like that which you have given to this son of yours?" He said: "No." The Messenger of Allah said: "Then do not ask me to bear witness, for I will not bear witness to unfairness