[Machine] To Saad ibn Abi Waqas, indeed the people of Kufa complain about everything, even in prayer.  

لِسَعْدِ بْنِ أَبِي وَقَّاصٍ ؓ إِنَّ أَهْلَ الْكُوفَةِ شَكَوْكَ فِي كُلِّ شَيْءٍ حَتَّى فِي الصَّلَاةِ  

[Machine] Umar said to Saad: "I have heard complaints about you in everything, even in prayer." Saad replied, "As for me, I prolong the prayers in the first two units and shorten them in the last two, and I do not deviate from the way the Prophet Muhammad ﷺ prayed." Umar said, "You are right in assuming that about me." In the narration of Shababah, Saad said, "I prolong the prayers in the first two units with them and shorten them in the last two." And he ended by saying, "That is what I assume about you, O Abu Ishaq."  

قَالَ عُمَرُ لِسَعْدٍ ؓ قَدْ شَكَوْكَ فِي كُلِّ شَيْءٍ حَتَّى الصَّلَاةِ قَالَ أَمَّا أَنَا فَأَمُدُّ فِي الْأُولَيَيْنِ وَأَحْذِفُ فِي الْأُخْرَيَيْنِ وَلَا آلُو مَا اقْتَدَيْتُ بِهِ مِنْ صَلَاةِ رَسُولِ اللهِ ﷺ قَالَ صَدَقْتَ ذَلِكَ الظَّنُّ بِكَ وَفِي حَدِيثِ شَبَابَةَ فَأَمُدُّ بِهِمْ فِي الْأُولَيَيْنِ وَأَحْذِفُ بِهِمْ فِي الْأُخْرَيَيْنِ وَقَالَ فِي آخِرِهِ فَقَالَ ذَلِكَ الظَّنُّ بِكَ يَا أَبَا إِسْحَاقَ  

The People of Kufa complained against Saʿd to ʿUmar and the latter dismissed him and appointed ʿAmmar as their chief . They lodged many complaints against Saʿd and even they alleged that he did not pray properly. ʿUmar sent for him and said, "O Aba 'Is-haq! These people claim that you do not pray properly." Abu 'Is-haq said, "By Allah, I used to pray with them a prayer similar to that of Allah's Apostle and I never reduced anything of it. I used to prolong the first two rakʿat of ʿIsha prayer and shorten the last two rakʿat." ʿUmar said, "O Aba 'Is-haq, this was what I thought about you." And then he sent one or more persons with him to Kufa so as to ask the people about him. So they went there and did not leave any mosque without asking about him. All the people praised him till they came to the mosque of the tribe of Bani ʿAbs; one of the men called Usama bin Qatada with a surname of Aba Saʿda stood up and said, "As you have put us under an oath; I am bound to tell you that Saʿd never went himself with the army and never distributed (the war booty) equally and never did justice in legal verdicts." (On hearing it) Saʿd said, "I pray to Allah for three things: O Allah! If this slave of yours is a liar and got up for showing off, give him a long life, increase his poverty and put him to trials." (And so it happened). Later on when that person was asked how he was, he used to reply that he was an old man in trial as the result of Saʿd's curse. ʿAbdul Malik, the sub narrator, said that he had seen him afterwards and his eyebrows were overhanging his eyes owing to old age and he used to tease and assault the small girls in the way. (Using translation from Bukhārī 755)   

شَكَا أَهْلُ الْكُوفَةِ سَعْدًا إِلَى عُمَرَ فَعَزَلَهُ وَاسْتَعْمَلَ عَلَيْهِمْ عَمَّارًا فَشَكَوْا حَتَّى ذَكَرُوا أَنَّهُ لَا يُحْسِنُ يُصَلِّي فَأَرْسَلَ إِلَيْهِ فَقَالَ يَا أَبَا إِسْحَاقَ إِنَّ هَؤُلَاءِ يَزْعُمُونَ أَنَّكَ لَا تُحْسِنُ تُصَلِّي قَالَ أَمَّا أَنَا وَاللهِ فَإِنِّي كُنْتُ أُصَلِّي بِهِمْ صَلَاةَ رَسُولِ اللهِ ﷺ مَا أَخْرِمُ عَنْهَا أُصَلِّي صَلَاةَ الْعِشَاءِ فَأَرْكُدُ فِي الْأُولَيَيْنِ وَأَحْذِفُ فِي الْأُخْرَيَيْنِ قَالَ ذَاكَ الظَّنُّ بِكَ يَا أَبَا إِسْحَاقَ فَأَرْسَلَ مَعَهُ رَجُلًا أَوْ رِجَالًا إِلَى أَهْلِ الْكُوفَةِ يَسْأَلُ عَنْهُ أَهْلَ الْكُوفَةِ فَلَمْ يَدَعْ مَسْجِدًا إِلَّا سَأَلَ عَنْهُ وَيُثْنُونَ مَعْرُوفًا حَتَّى دَخَلَ مَسْجِدَ بَنِي عَبْسٍ فَجَلَسَ فَقَامَ رَجُلٌ مِنْهُمْ يُقَالُ لَهُ أُسَامَةُ بْنُ قَتَادَةَ يُكْنَى أَبَا سَعْدَةَ قَالَ أَمَا إِذَا أَنَشَدْتَنَا فَإِنَّ سَعْدًا كَانَ لَا يَسِيرُ بِالسَّرِيَّةِ وَلَا يَقْسِمُ بِالسَّوِيَّةِ وَلَا يَعْدِلُ فِي الْقَضِيَّةِ قَالَ سَعْدٌ أَمَا وَاللهِ لَأَدْعُوَنَّ اللهَ بِثَلَاثٍ اللهُمَّ إِنْ كَانَ عَبْدُكَ هَذَا كَاذِبًا قَامَ رِيَاءً وَسُمْعَةً فَأَطِلْ عُمْرَهُ وَأَطِلْ فَقْرَهُ وَعَرِّضْهُ بِالْفِتَنِ وَكَانَ بَعْدُ إِذْ يُسْأَلُ يَقُولُ شَيْخٌ كَبِيرٌ مَفْتُونٌ أَصَابَتْنِي دَعْوَةُ سَعْدٍ قَالَ عَبْدُ الْمَلِكِ فَأَنَا رَأَيْتُهُ بَعْدُ قَدْ سَقَطَ حَاجِبَاهُ عَلَى عَيْنَيْهِ مِنَ الْكِبَرِ وَإِنَّهُ لَيَتَعَرَّضُ لِلْجَوَارِي فِي الطُّرُقِ يَغْمِزُهُنَّ