Musannaf Ibn Abi Shayba 13:1023

Abu Bakr narrated to us, he said: Ibn Abi Za’idah narrated to us, from Humayd, from Anas, who said: Abu Taybah cupped the Prophet, may Allah bless him and grant him peace, and he gave him two sa’s of food. And he spoke to his family, so they reduced his tax (kharaj).