(76) باب السَّلاَمِ بَعْدَ سَجْدَتَىِ السَّهْوِ
It was narrated from 'Imran bin Husain that:
The Prophet (ﷺ) prayed three (rak'ahs) then said the taslim. Al-Khirbaq said: "You prayed three." So he led them in praying the remaining rak'ah, then he said the taslim, then he did the two prostrations of forgetfulness, then he said the taslim (again).
Reference: Sunan an-Nasa'i 1331
In-book reference: Book 13, Hadith 153
English translation: Vol. 2, Book 13, Hadith 1332