(17) باب التَّنَحْنُحِ فِي الصَّلاَةِ
It was narrated that 'Ali said:
"I had two times when I would enter upon the Messenger of Allah (ﷺ), one at night and one during the day. When I entered at night he would clear his throat (to tell me to come in)." (FR)
Reference (FR): Sunan an-Nasa'i 1212 (FR)
In-book reference (FR): Book 13, Hadith 34 (FR)
English translation (FR): Vol. 2, Book 13, Hadith 1213 (FR)