"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)."
عَلِيٌّ كَانَ لِي مِنْ رَسُولِ اللَّهِ ﷺ مَدْخَلاَنِ مَدْخَلٌ بِاللَّيْلِ وَمَدْخَلٌ بِالنَّهَارِ فَكُنْتُ إِذَا دَخَلْتُ بِاللَّيْلِ تَنَحْنَحَ لِي