Sahih Muslim Hadith 1274 – As-Sahw
English
[1274] 89 – (572) It was narrated that 'Alqamah said: "Abdullâh said: 'The Messenger of Allah 4$r, offered Salât" – IbrâhIm said: "and he added or omitted something. – 'When he said the Salâm (at the completion of Salât), it was said to him: "0 Messenger of Allah, has something new been introduced into the prayer?" He said: "Why is that?" They said: "You did such and such in the prayer." He turned to face the Qiblah, then he prostrated twice and said the TaslIm, then he turned to face us and said: "If anything new had been introduced into the prayer I would have told you. But I am human, I forget as you forget. If I forget, then remind me. If one of you is unsure in his prayer, let him work out what is correct and proceed on that basis, then prostrate twice."