Sunan an-Nasa'i

It was narrated from 'Abdullah that : The Messenger of Allah (ﷺ) offered one of the afternoon prayers with five (rak'ahs), and it was said to him: "Has something been added to the prayer?" He said: “Why are you asking?' They said: “You prayed five.' He said: “I am only human, I forget as you forget, and I remember as you remember.' Then he prostrated twice then ended his prayer”””