‘Abd Allah (b. Mas’ud) said :
The Messenger of Allah ﷺ prayed five rak’ahs in the noon prayer. He was asked whether the prayer had been extended. He asked what they meant by that. The people said : you prayed five rak’ahs. Then he made two prostrations after having given the salutation.

حَدَّثَنَا حَفْصُ بْنُ عُمَرَ، وَمُسْلِمُ بْنُ إِبْرَاهِيمَ، - الْمَعْنَى - قَالَ حَفْصٌ حَدَّثَنَا شُعْبَةُ، عَنِ الْحَكَمِ، عَنْ إِبْرَاهِيمَ، عَنْ عَلْقَمَةَ، عَنْ عَبْدِ اللَّهِ، قَالَ صَلَّى رَسُولُ اللَّهِ ﷺ الظُّهْرَ خَمْسًا . فَقِيلَ لَهُ أَزِيدَ فِي الصَّلاَةِ قَالَ " وَمَا ذَاكَ " . قَالَ صَلَّيْتَ خَمْسًا . فَسَجَدَ سَجْدَتَيْنِ بَعْدَ مَا سَلَّمَ .