Muhammad bin Sirin said :
"Whenever Anas bin Malik finished narrating a Hadith from the Messenger of Allah (ﷺ), he would say, 'Or as the Messenger of Allah (ﷺ) said.'" (IT)
English reference (IT): Vol. 1, Book 1, Hadith 24 (IT)
Arabic reference (IT): Book 1, Hadith 25 (IT)