عَنِ ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُ قَالَ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقْرَأُ عَلَيْنَا السُّورَةَ فَيَقْرَأُ السَّجْدَةَ فِي غَيْرِ صَلَاةٍ فَيَسْجُدُ وَنَسْجُدُ مَعَهُ حَتَّى مَا يَجِدُ أَحَدُنَا مَكَانًا لِمَوْضِعِ جَبْهَتِهِ
Sayyiduna Abdullah bin Umar (may Allah be pleased with him) says: The Messenger of Allah (peace and blessings be upon him) would recite a Surah containing a verse of prostration before us, while he (peace and blessings be upon him) was not in prayer. Then, when he (peace and blessings be upon him) performed the prostration of recitation, we would also prostrate along with him (peace and blessings be upon him), to the extent that some of us would not even find a place to put our foreheads down.