Musannaf Ibn Abi Shayba 13:2338

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Ibn Abi Layla, from Ibn Jurayj, he said: Umar ibn Abd al-Aziz wrote: If a gift is consumed, or it is compensated for, or it is gifted to a relative, then he has no right to retract it.