Call to Prayers (Adhaan)
10/155. Chapter:
The Dhikr (remembering Allah by Glorifying, Praising and Magnifying Him) after As-Salat (the prayer)
Sahih Bukhari
حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، قَالَ حَدَّثَنَا سُفْيَانُ، {عَنْ عَمْرٍو،} قَالَ أَخْبَرَنِي أَبُو مَعْبَدٍ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ قَالَ كُنْتُ أَعْرِفُ انْقِضَاءَ صَلاَةِ النَّبِيِّ صلى الله عليه وسلم بِالتَّكْبِيرِ.
Narrated Ibn `Abbas: I used to recognize the completion of the prayer of the Prophet (ﷺ) by hearing Takbir.
Reference : Sahih al-Bukhari 842In-book reference : Book 10, Hadith 234USC-MSA web (English) reference : Vol. 1, Book 12, Hadith 803