Abu Bakr bin Abi Shayba أبو بكر بن أبي شيبة · The Chapters on Gifts

“Bear witness that I have given Nu'man such and such from my wealth.” He said: “Have you given all your children something like that which you have given to Nu'man?” He said: “No.” He said: “Then let someone other than me bear witness to that.” And he said: “Would you not like all your children to honor you equally?” He said: “Of course.” He said: “Then do not do this.”

“It is not permissible for a man to give a gift then take it back, except what a father gives to his child.”

“There is no lifelong grant. Whoever is given something as a lifelong grant, it is his.' ”

“I heard the Messenger of Allah (ﷺ) say: 'Whoever gives a lifelong grant to a man, it belongs to him (the recipient) and to his heirs. His (the giver's) words put an end to his right to it, and it belongs to the one to whom it was given for life and to his heirs.”

“The likeness of one who takes back his gift is that of a dog that eats until it is full and vomits; then it goes back to its vomit and eats it again.”

“The one who takes back his gift is like the one who goes back to his vomit.”