صحيح البخاري Sahih Bukhari كتاب سجود القرآن The Book of Prostration During The Recitation of The Quran.
بَابُ ازْدِحَامِ النَّاسِ إِذَا قَرَأَ الإِمَامُ السَّجْدَةَ:

(9) Chapter. The overcrowding of the people when the Imam recites As-Sajda.

1 hadith
Hadith 1076
حَدَّثَنَا بِشْرُ بْنُ آدَمَ ، قَالَ : حَدَّثَنَا عَلِيُّ بْنُ مُسْهِرٍ ، قَالَ : أَخْبَرَنَا عُبَيْدُ اللَّهِ ، عَنْ نَافِعٍ ، عَنِ ابْنِ عُمَرَ ، قَالَ : " كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقْرَأُ السَّجْدَةَ وَنَحْنُ عِنْدَهُ فَيَسْجُدُ وَنَسْجُدُ مَعَهُ ، فَنَزْدَحِمُ حَتَّى مَا يَجِدُ أَحَدُنَا لِجَبْهَتِهِ مَوْضِعًا يَسْجُدُ عَلَيْهِ " .
Narrated Ibn `Umar: When the Prophet recited Surat As-Sajda and we were with him, he would prostrate and we also would prostrate with him and some of us (because of the heavy rush) would not find a place (for our foreheads) to prostrate on.
Hadith Reference Sahih Bukhari / The Book of Prostration During The Recitation of The Quran. / Hadith: 1076
Hadith Grading محدثین: أحاديث صحيح البخاريّ كلّها صحيحة