Sunan an-Nasai 15719
In-book no 983أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا الْعَطَّافُ بْنُ خَالِدٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، قَالَ دَخَلْنَا عَلَى أَنَسِ بْنِ مَالِكٍ فَقَالَ صَلَّيْتُمْ قُلْنَا نَعَمْ . قَالَ يَا جَارِيَةُ هَلُمِّي لِي وَضُوءًا مَا صَلَّيْتُ وَرَاءَ إِمَامٍ أَشْبَهَ صَلاَةً بِرَسُولِ اللَّهِ صلى الله عليه وسلم مِنْ إِمَامِكُمْ هَذَا . قَالَ زَيْدٌ وَكَانَ عُمَرُ بْنُ عَبْدِ الْعَزِيزِ يُتِمُّ الرُّكُوعَ وَالسُّجُودَ وَيُخَفِّفُ الْقِيَامَ وَالْقُعُودَ .
It was narrated that Zaid bin Aslam said: "We entered upon Anas bin Malik and he said: 'Have you prayed?' We said: 'Yes.' He asid: 'O slave girl, bring me water for Wudhu! I have never prayed behind any Imam whose prayer more closely resembles the prayer of the Messenger of Allah (ﷺ) than this Imam of yours.'" Zaid said: "Umar bin Abdul Aziz used to complete the bowing and prostration (without rushing) and lighten the standing and sitting."