(41) باب اخْتِلاَفِ نِيَّةِ الإِمَامِ وَالْمَأْمُومِ
837. It was narrated from Abu Bakr that the Prophet (ﷺ) offered the fear prayer (Salat Al-Khauf). He led those who were behind him in two Rak'ah and those who came (after them) in two Rak'ah, so the Prophet (ﷺ) prayed four Rak'ahs and each group prayed two.
Reference: Sunan an-Nasa'i 836
In-book reference: Book 10, Hadith 60
English translation: Vol. 1, Book 10, Hadith 837