The Messenger of Allah ﷺ would recite to us a surah (according to the version of Ibn Numair) outside the prayer (the agreed version goes), then he would prostrate along with him, and none of us could find a place for his forehead.
كَانَ رَسُولُ اللَّهِ ﷺ يَقْرَأُ عَلَيْنَا السُّورَةَ قَالَ ابْنُ نُمَيْرٍ فِي غَيْرِ الصَّلاَةِ ثُمَّ اتَّفَقَا فَيَسْجُدُ وَنَسْجُدُ مَعَهُ حَتَّى لاَ يَجِدُ أَحَدُنَا مَكَانًا لِمَوْضِعِ جَبْهَتِهِ
When the Prophet ﷺ 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.
كَانَ النَّبِيُّ ﷺ يَقْرَأُ عَلَيْنَا السُّورَةَ فِيهَا السَّجْدَةُ فَيَسْجُدُ وَنَسْجُدُ حَتَّى مَا يَجِدُ أَحَدُنَا مَوْضِعَ جَبْهَتِهِ
Whenever the Prophet ﷺ recited the Sura which contained the prostration of recitation he used to prostrate and then, we, too, would prostrate and some of us did not find a place for prostration.
كَانَ النَّبِيُّ ﷺ يَقْرَأُ السُّورَةَ الَّتِي فِيهَا السَّجْدَةُ فَيَسْجُدُ وَنَسْجُدُ حَتَّى مَا يَجِدُ أَحَدُنَا مَكَانًا لِمَوْضِعِ جَبْهَتِهِ
The Messenger of Allah ﷺ would recite to us a surah (according to the version of Ibn Numair) outside the prayer (the agreed version goes), then he would prostrate along with him, and none of us could find a place for his forehead. (Using translation from Abū Dāʾūd 1412)
كَانَ رَسُولُ اللهِ ﷺ يَقْرَأُ عَلَيْنَا السُّورَةَ فَيَقْرَأُ السَّجْدَةَ فَيَسْجُدُ وَنَسْجُدُ مَعَهُ حَتَّى مَا يَجِدُ أَحَدُنَا مَكَانًا لِمَوْضِعِ جَبْهَتِهِ