(25) باب التَّحَرِّي
It was narrated that 'Abdullah said:
"Whoever has doubt, or is not sure, let him estimate what is correct, then let him prostrate twice." (AR)
Reference (AR): Sunan an-Nasa'i 1246 (AR)
In-book reference (AR): Book 13, Hadith 68 (AR)
English translation (AR): Vol. 2, Book 13, Hadith 1247 (AR)