وَعَنْ أَبِي قَتَادَةٌ فِي اَلْحَدِيثِ اَلطَّوِيلِ
«فِي نَوْمهُمْ عَنْ اَلصَّلَاةِ (ثُمَّ أَذَّنَ بِلَالٌ، فَصَلَّى رَسُولُ اَللَّهِ) صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَمَا كَانَ يَصْنَعُ كُلَّ يَوْمٍ»
Then Bilal proclaimed the Adhan and the Prophet (sallallahu alayhi wa sallam) offered the prayer (while leading the Companions) as he used to do every day.
Bulugh al-Maram 225, Book 2, The Book of Prayer, Hadith 46. 1 min read