Sahih Muslim Book 4, Hadith Number 818.

Chapter : The reciting of Tasmi’ (Allah listens to him who praises Him) Tahmid (O our Lord, for Thee is the praise), and Timin (Amin).

Anas b. Malik reported: The Messenger of Allah (may peace be upon him) fell down from a horse and he was grazed and he led the prayer for us sitting, and the rest of the Hadith is the same.