Sahih al-Bukhari Hadith 6358

We said, "O Allah's Messenger (ﷺ) This is (i.e. we know) the greeting to you; will you tell us how to send Salat on you?" He said, "Say: 'Allahumma Salli 'ala Muhammadin `Abdika wa rasulika kama sal-laita 'ala Ibrahima wa barik 'ala Muhammadin wa all Muhammadin kama barakta 'ala Ibrahima wa `Ali Ibrahim." O Allah! Bestow blessings on Hadra Muhammad, Your bondsman and Apostle as You did confer upon Hadrat Ibrahim and confer favours on Hadrat Muhammad as well as Hadrat Muhammad's progeny, as you did bestow on Hadrat Ibrahim Hadrat Ibrahim's progeny.