Sahih al-Bukhari 4798
Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
The Statement of Allah the Most High: "Allah sends His Salāt (Graces, Honours, Blessings and Mercy) on the Prophet (Muḥammad ﷺ) and also His angels (ask Allah to bless and forgive him)..." (V.33:56)
Narrated Abu Sa`id Al-Khudri: We said, "O Allah's Messenger (ﷺ) ! (We know) this greeting (to you) but how shall we invoke Allah for you?" He said, "Say! Allahumma salli ala Muhammadin `Abdika wa rasulika kama- sallaita 'ala all Ibrahim wa barik ala Muhammadin wa'ala all Muhammadin kama barakta 'ala all Ibrahim.' Al-Laith said: 'Ala Muhammadin wa 'ala all Muhammadin kama barakta ala all Ibrahim. Narrated Ibn Abi Hazim and Ad-Darawardi: Yazid said, "Kama sallaita ala Ibrahima wa barik 'ala Muhammad in wa all Muhammadin kama barakta 'ala Abrahima wa all Ibrahim."