Sunan an-Nasa'i 1212
سنن النسائي#1212Da'ifأَخْبَرَنِي مُحَمَّدُ بْنُ عُبَيْدٍ، قَالَ حَدَّثَنَا ابْنُ عَيَّاشٍ، عَنْ مُغِيرَةَ، عَنِ الْحَارِثِ الْعُكْلِيِّ، عَنِ ابْنِ نُجَىٍّ، قَالَ قَالَ عَلِيٌّ كَانَ لِي مِنْ رَسُولِ اللَّهِ صلى الله عليه وسلم مَدْخَلاَنِ مَدْخَلٌ بِاللَّيْلِ وَمَدْخَلٌ بِالنَّهَارِ فَكُنْتُ إِذَا دَخَلْتُ بِاللَّيْلِ تَنَحْنَحَ لِي .
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)
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 13:34