Anas used to demonstrate to us the prayer of the Prophet ﷺ and while demonstrating, he used to raise his head from bowing and stand so long that we would say that he had forgotten (the prostration). (Using translation from Bukhārī 800)
كَانَ أَنَسٌ ؓ يَنْعَتُ لَنَا صَلَاةَ رَسُولِ اللهِ ﷺ كَانَ يُصَلِّي فَإِذَا رَفَعَ رَأْسَهُ مِنَ الرُّكُوعِ قَامَ حَتَّى نَقُولَ قَدْ نَسِيَ
Anas used to demonstrate to us the prayer of the Prophet ﷺ and while demonstrating, he used to raise his head from bowing and stand so long that we would say that he had forgotten (the prostration).
كَانَ أَنَسٌ يَنْعَتُ لَنَا صَلاَةَ النَّبِيِّ ﷺ فَكَانَ يُصَلِّي وَإِذَا رَفَعَ رَأْسَهُ مِنَ الرُّكُوعِ قَامَ حَتَّى نَقُولَ قَدْ نَسِيَ
[Machine] He used to describe the prayer of the Messenger of Allah to us, and then he would stand up and pray. When he raised his head from bowing, we said, "He has forgotten how long he stood."
كَانَ يَنْعَتُ لَنَا صَلَاةَ رَسُولِ اللهِ ﷺ ثُمَّ يَقُومُ فَيُصَلِّي فَإِذَا رَفَعَ رَأْسَهُ مِنَ الرُّكُوعِ قُلْنَا قَدْ نَسِيَ مِنْ طُولِ مَا يَقُومُ
[Machine] I heard that Anas ibn Malik described to us the prayer of the Messenger of Allah ﷺ , saying, "He would stand and perform the prayer, and when he raised his head from the bowing position, we would say, 'He has forgotten the length of standing.'"
سَمِعْتُ أَنَسَ بْنَ مَالِكٍ يَنْعَتُ لَنَا صَلَاةَ رَسُولِ اللَّهِ ﷺ «يَقُومُ فَيُصَلِّي فَإِذَا رَفَعَ رَأْسَهُ مِنَ الرُّكُوعِ قُلْنَا قَدْ نَسِيَ مِنْ طُولِ الْقِيَامِ»