Sahih al-Bukhari, Hadith 1075 ⓘ
Narrated Ibn `Umar: When the Prophet recited a Sura that contained the prostration he would prostrate and we would do the same and some of us (because of the heavy rush) could not find a place for prostration.
حَدَّثَنَا مُسَدَّدٌ، قَالَ حَدَّثَنَا يَحْيَى، عَنْ عُبَيْدِ اللَّهِ، قَالَ حَدَّثَنِي نَافِعٌ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ كَانَ النَّبِيُّ صلى الله عليه وسلم يَقْرَأُ عَلَيْنَا السُّورَةَ فِيهَا السَّجْدَةُ، فَيَسْجُدُ وَنَسْجُدُ، حَتَّى مَا يَجِدُ أَحَدُنَا مَوْضِعَ جَبْهَتِهِ.
also referenced under: Book 17, Hadith 9 (In-Book) & Volume 2, Book 19, Hadith 181 (USC-MSA)