Sahih Muslim Book: 5, Hadith: 472

حَدَّثَنَا خَلَفُ بْنُ هِشَامٍ، حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ، عَنْ ثَابِتٍ، عَنْ أَنَسٍ، قَالَ إِنِّي لاَ آلُو أَنْ أُصَلِّيَ بِكُمْ كَمَا رَأَيْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يُصَلِّي بِنَا ‏.‏ قَالَ فَكَانَ أَنَسٌ يَصْنَعُ شَيْئًا لاَ أَرَاكُمْ تَصْنَعُونَهُ كَانَ إِذَا رَفَعَ رَأْسَهُ مِنَ الرُّكُوعِ انْتَصَبَ قَائِمًا حَتَّى يَقُولَ الْقَائِلُ قَدْ نَسِيَ ‏.‏ وَإِذَا رَفَعَ رَأْسَهُ مِنَ السَّجْدَةِ مَكَثَ حَتَّى يَقُولَ الْقَائِلُ قَدْ نَسِيَ ‏.‏ Thabit reported it on the authority of Anas:While leading you in prayer I do not shorten anything in the prayer. I pray as I saw the Messenger of Allah (may peace be upon him) leading us. He (Thabit) said: Anas used to do that which I do not see you doing; when he lifted his head from bowing he stood up (so long) that one would say: He has forgotten (to baw down in prostration). And when he lifted his head from prostration, he stayed in that position, till someone would say: He has forgotten (to bow down in prostration for the s...