Musnad Ahmad 13:1

'Ali ibn Bahr narrated to us, 'Isa ibn Yunus narrated to us, 'Uthman ibn Hakim narrated to us, Khalid ibn Salamah narrated to us, that 'Abd al-Hamid ibn 'Abd al-Rahman invited Musa ibn Talhah when he held a wedding feast for his son. He said: "O Abu 'Isa, what has reached you regarding the prayer upon the Prophet, may Allah bless him and grant him peace?" Musa said: "I asked Zayd ibn Kharijah about the prayer upon the Prophet, may Allah bless him and grant him peace." Zayd said: "I asked the Messenger of Allah, may Allah bless him and grant him peace, myself: 'How is the prayer upon you?'" He said: "Pray and strive, then say: 'O Allah, bless Muhammad and the family of Muhammad, as You blessed Ibrahim; indeed, You are Praiseworthy, Glorious.'"