Sahih al Bukhari 730
Call to Prayers (Adhaan)
حَدَّثَنَا إِبْرَاهِيمُ بْنُ الْمُنْذِرِ، قَالَ حَدَّثَنَا ابْنُ أَبِي فُدَيْكٍ، قَالَ حَدَّثَنَا ابْنُ أَبِي ذِئْبٍ، عَنِ الْمَقْبُرِيِّ، عَنْ أَبِي سَلَمَةَ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ أَنَّ النَّبِيَّ صلى الله عليه وسلم كَانَ لَهُ حَصِيرٌ يَبْسُطُهُ بِالنَّهَارِ، وَيَحْتَجِرُهُ بِاللَّيْلِ، فَثَابَ إِلَيْهِ نَاسٌ، فَصَلَّوْا وَرَاءَهُ.
Narrated `Aisha:The Prophet (ﷺ) had a mat which he used to spread during the day and use as a curtain at night. So a number of people gathered at night facing it and prayed behind him
Text from the public-domain hadith-api dataset. Numbering follows that dataset and can differ by a few from some printed editions — check the wording, not only the number.