Ibn ‘Abbas reported God’s Messenger as saying, "One who seeks to take back a gift is like a dog which returns to its vomit. An evil example does not apply to us*.”
* i.e. to Muslims.
Jabir reported God’s Messenger as saying, “Keep your properties for yourselves and do not squander them, for if anyone gives a life- tenancy it goes to the one to whom it is given, both during his life and after his death, and to his descendants."