(32) باب الصَّلاَةِ عَلَى النَّبِيِّ صلى الله عليه وسلم
Narrated `Abdur-Rahman bin Abi Laila:
Ka`b bin 'Ujra met me and said, "Shall I give you a present? Once the Prophet (ﷺ) came to us and we said, 'O Allah's Messenger (ﷺ) ! We know how to greet you; but how to send 'Salat' upon you? He said, 'Say: Allahumma Salli ala Muhammadin wa 'ala `Ali Muhammadin, kama sal-laita 'ala all Ibrahima innaka Hamidun Majid. Allahumma barik 'ala Muhammadin wa 'ala all Muhammadin, kama barakta 'ala all Ibrahima, innaka Hamidun Majid."
Reference: Sahih al-Bukhari 6357
In-book reference: Book 80, Hadith 54
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 75, Hadith 368