Musnad Abu Ya'la al-Mawsili 155:263

'Abdullah ibn 'Awn narrated to us, Abu Mu'awiyah narrated to us, al-A'mash narrated to us, he said: I was informed by Abu Zur'ah, from Abu Hurayrah, that the Messenger of Allah (may Allah bless him and grant him peace) said: "O Allah, make the provision of the family of Muhammad in the world a sustenance."