وَعَنِ ابْنِ عُمَرَ
أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ سَجَدَ فِي صَلَاةِ الظُّهْرِ ثُمَّ قَامَ فَرَكَعَ فَرَأَوْا أَنَّهُ قَرَأَ تَنْزِيلَ السَّجْدَةَ
The Prophet (sallallahu alayhi wa sallam) made a prostration in the noon prayer, then stood up and bowed; and they thought he recite Tanzil, i.e. sura as-Sajda (Al-Qur’an; 32).