Sunan an-Nasa'i 1293

Qutaybah narrated to us: Bakr narrated to us—he is Ibn Mudar—from Ibn al-Hadi, from ‘Abd Allah ibn Khabbab, from Abu Sa‘id al-Khudri, who said: We said, “O Messenger of Allah, we know how to offer you greetings of peace; how should we invoke blessings upon you?” He said: “Say: ‘O Allah, send blessings upon Muhammad, Your servant and Messenger, as You sent blessings upon Ibrahim. You are indeed Praiseworthy, Glorious. And bless Muhammad and the family of Muhammad, as You blessed Ibrahim.’”