"Some of the peole of Al-Khufah complained about Sa'd to 'Umar. They said: 'By Allah, he does not pray properly.' He said: 'I lead them in prayer as the Messenger of Allah ﷺ did, and I do not deviate from that. I take my time in the first two rak'ahs and make the other two shorter.' He (Umar) said: 'That is what I thought about you.'" (Using translation from Nasāʾī 1003)
«وَقَعَ نَاسٌ مِنْ أَهْلِ الْكُوفَةِ فِي سَعْدٍ عِنْدَ عُمَرَ» فَقَالُوا وَاللهِ مَا يُحْسِنُ الصَّلَاةَ فَقَالَ «أَمَّا أَنَا فَإِنِّي أُصَلِّي صَلَاةَ رَسُولِ اللهِ ﷺ لَا أَخْرِمُ مِنْهَا أَرْكُدُ فِي الْأُولَيَيْنِ وَأَحْذِفُ فِي الْأُخْرَيَيْنِ» قَالَ «ذَاكَ الظَّنُّ بِكَ»