Clearing the throat while praying

Sunan an-Nasa'i · Book 13 · Hadith 1211

أَخْبَرَنَا مُحَمَّدُ بْنُ قُدَامَةَ، قَالَ حَدَّثَنَا جَرِيرٌ، عَنِ الْمُغِيرَةِ، عَنِ الْحَارِثِ الْعُكْلِيِّ، عَنْ أَبِي زُرْعَةَ بْنِ عَمْرِو بْنِ جَرِيرٍ، قَالَ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُجَىٍّ، عَنْ عَلِيٍّ، قَالَ كَانَ لِي مِنْ رَسُولِ اللَّهِ صلى الله عليه وسلم سَاعَةٌ آتِيهِ فِيهَا فَإِذَا أَتَيْتُهُ اسْتَأْذَنْتُ إِنْ وَجَدْتُهُ يُصَلِّي فَتَ…

It was narrated that 'Ali said: "I had certain times when I used to come to the Messenger of Allah (ﷺ). When I came to him I would ask for permission to enter. If I found him praying he would clear his throat and I would…

Sunan an-Nasa'i · Book 13 · Hadith 1212

أَخْبَرَنِي 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)."