Sunan al-Nasa'i
The Book of the Adhan (The Call to Prayer) — Hadith #643
أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ أَنْبَأَنَا الْمُعْتَمِرُ بْنُ سُلَيْمَانَ، عَنْ أَبِيهِ، عَنْ أَبِي عُثْمَانَ، عَنِ ابْنِ مَسْعُودٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ
" إِنَّ بِلاَلاً يُؤَذِّنُ بِلَيْلٍ لِيُوقِظَ نَائِمَكُمْ وَلِيَرْجِعَ قَائِمَكُمْ وَلَيْسَ أَنْ يَقُولَ هَكَذَا " . يَعْنِي فِي الصُّبْحِ .
“Bilal calls the Adhan during the night to wake those who are sleeping and so that those who are praying Qiyam can return.
Meaning to finish. Ash-Shawkani said: “To return to sleeping or return to sitting from praying” Nail Al-Awtar.
Indicating with an up and down motion. The true dawn is from right to left.
Chain of Narration (Isnad)