"Whoever has doubt, or is not sure, let him estimate what is correct, then let him prostrate twice."
Sunan an-Nasa'i Book 13, Hadith 68
← Previous Hadith "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."

Sunan an-Nasa'i Book 13, Hadith 67 Next Hadith → "They used to say: 'If one is not sure of what he estimates is correct, then prostrate twice.'"

Sunan an-Nasa'i Book 13, Hadith 69