Abu Dawud Book 17, Hadith Number 3532.

Chapter : Not known.

Narated By Abdullah Ibn Umar Abdullah Ibn Abbas : The Prophet (PBUH) said: It is not lawful for a man to make a donation or give a gift and then take it back, except a father regarding what he gives his child. One who gives a gift and then takes it back is like a dog which eats and vomits when it is full, then returns to its vomit.