Sunan an-Nasa'i, 1242

It was narrated that 'Abdullah said:"The Messenger of Allah (ﷺ) prayed and did more or less (rak'ahs). When he had said the taslim, it was said: 'O Messenger of Allah, has there been some change concerning the prayer?' He said: 'If there had been some change concerning the prayer, I would have told you. Rather I am a human being and I forget as you forget. If any one of you is not sure about his prayer, let him consider an estimate of what is correct, and complete his prayer on that basis, then say the taslim and prostrate twice

Rapporté par ‘Abdullah : Le Messager d’Allah (ﷺ) a prié et a fait plus ou moins de rak‘a. Quand il a fait le taslim, on lui a dit : "Ô Messager d’Allah, y a-t-il eu un changement concernant la prière ?" Il a répondu : "S’il y avait eu un changement concernant la prière, je vous l’aurais dit. Mais je suis un être humain et j’oublie comme vous oubliez. Si l’un de vous n’est pas sûr de sa prière, qu’il estime ce qui est correct et termine sa prière sur cette base, puis qu’il fasse le taslim et se prosterne deux fois