Musannaf Ibn Abi Shayba 33:153

Waki’ narrated to us, he said: Al-A’mash narrated to us, from ‘Umarah ibn Qa’qa’, from Abu Zur’ah ibn ‘Amr ibn Jarir, from Abu Hurayrah, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "O Allah, make the provision of the family of Muhammad only enough to sustain them."