(25) باب التَّحَرِّي
It was narrated that 'Abdullah said:
"Whoever us not sure about his prayer, then let him estimate what is correct, then let him prostrate twice after he finished his prayer, while he is sitting." (AR)
Reference (AR): Sunan an-Nasa'i 1245 (AR)
In-book reference (AR): Book 13, Hadith 67 (AR)
English translation (AR): Vol. 2, Book 13, Hadith 1246 (AR)