Musnad Ahmad 769:32

Wahb ibn Jarir narrated to us, Shu'bah narrated to us, from 'Amr ibn Murrah, from 'Abdullah ibn Abi Awfa—and he was one of the companions of the Tree—he said: When a people brought charity to the Prophet, may Allah bless him and grant him peace, he would say: "O Allah, send blessings upon them." My father brought him charity, so he said: "O Allah, send blessings upon the family of Abi Awfa."