Riyad us Saliheen: Hadith 1406

The Companions of the Messenger of Allah (ﷺ) said: "O Messenger of Allah! How should we supplicate for you?" He (ﷺ) replied, "Say: 'Allahumma salli 'ala Muhammadin wa 'ala azwajihi wa dhurriyyatihi, kama sallaita 'ala Ibrahima; wa barik 'ala Muhammadin wa 'ala azwajihi wa dhurriyyatihi, kama barakta 'ala Ibrahima, innaka Hamidum-Majid (O Allah sent Your Salat (O Allah, exalt the mention of Muhammad and his wives and offspring as You exalted the mention of the family of Ibrahim, and bless Muhammad and the wives and the offspring of Muhammad as you blessed the family of Ibrahim. You are the Praised, the Glorious'."

[Al-Bukhari and Muslim].