Musnad Ahmad 534:2

Hushaym narrated to us, Hisham ibn Yusuf informed us, he said: I heard Abdullah ibn Busr narrating that his father prepared food for the Prophet, may Allah bless him and grant him peace, and invited him, so he accepted. When he finished his food, he said: "O Allah, forgive them, have mercy upon them, and bless for them that which You have provided them."