"Once the Prophet ﷺ offered five rakʿat in Zuhr prayer. He was asked, "Is there an increase in the prayer?" The Prophet ﷺ said, "And what is it?" They said, "You have prayed five rakʿat.' So he bent his legs and performed two prostrations (of Sahu). (Using translation from Bukhārī 404)
«صَلَّى النَّبِيُّ ﷺ الظُّهْرَ خَمْسًا» فَقِيلَ لَهُ أَزِيدَ فِي الصَّلَاةِ؟ قَالَ «وَمَا ذَاكَ؟» قَالُوا صَلَّيْتَ خَمْسًا فَثَنَى رِجْلَهُ وَسَجَدَ سَجْدَتَيْنِ