The Prophet ﷺ said: Cannot any one of you (according to the version of the narrator AbdulWarith) step forward or backward or at his right or left. The version of Hammad added: during prayer; that is, in supererogatory prayer.  

قَالَ رَسُولُ اللَّهِ ﷺ أَيَعْجِزُ أَحَدُكُمْ قَالَ عَنْ عَبْدِ الْوَارِثِ أَنْ يَتَقَدَّمَ أَوْ يَتَأَخَّرَ أَوْ عَنْ يَمِينِهِ أَوْ عَنْ شِمَالِهِ زَادَ فِي حَدِيثِ حَمَّادٍ فِي الصَّلاَةِ يَعْنِي فِي السُّبْحَةِ  

An imam of ours, whose kunyah (surname) was AbuRimthah, led us in prayer and said: I prayed this prayer, or one like it, with the Prophet ﷺ. AbuBakr and Umar were standing in the front row on his right and there was a man who had been present at the first takbir in the prayer. The Prophet of Allah ﷺ offered the prayer, then gave the salutation to his right and his left so that we saw the whiteness of his cheeks, then turned away as AbuRimthah (meaning himself) had done. The man who has been present with him at the first takbir in the prayer then got up to pray another prayer, whereupon Umar leaped up and, seizing him by the shoulders, shook him and said: Sit down, for the People of the Book perished for no other reason than that there was no interval between their prayers. The Prophet ﷺ raised his eyes and said: Allah has made you say what is right, son of al-Khattab. Abu Dawud said: Sometimes the name of Abu Umayyah is narrated instead of Abu Rimthah.  

صَلَّى بِنَا إِمَامٌ لَنَا يُكْنَى أَبَا رِمْثَةَ فَقَالَ صَلَّيْتُ هَذِهِ الصَّلاَةَ أَوْ مِثْلَ هَذِهِ الصَّلاَةِ مَعَ النَّبِيِّ ﷺ قَالَ وَكَانَ أَبُو بَكْرٍ وَعُمَرُ يَقُومَانِ فِي الصَّفِّ الْمُقَدَّمِ عَنْ يَمِينِهِ وَكَانَ رَجُلٌ قَدْ شَهِدَ التَّكْبِيرَةَ الأُولَى مِنَ الصَّلاَةِ فَصَلَّى نَبِيُّ اللَّهِ ﷺ ثُمَّ سَلَّمَ عَنْ يَمِينِهِ وَعَنْ يَسَارِهِ حَتَّى رَأَيْنَا بَيَاضَ خَدَّيْهِ ثُمَّ انْفَتَلَ كَانْفِتَالِ أَبِي رِمْثَةَ يَعْنِي نَفْسَهُ فَقَامَ الرَّجُلُ الَّذِي أَدْرَكَ مَعَهُ التَّكْبِيرَةَ الأُولَى مِنَ الصَّلاَةِ يَشْفَعُ فَوَثَبَ إِلَيْهِ عُمَرُ فَأَخَذَ بِمَنْكِبِهِ فَهَزَّهُ ثُمَّ قَالَ اجْلِسْ فَإِنَّهُ لَمْ يَهْلِكْ أَهْلُ الْكِتَابِ إِلاَّ أَنَّهُ لَمْ يَكُنْ بَيْنَ صَلَوَاتِهِمْ فَصْلٌ فَرَفَعَ النَّبِيُّ ﷺ بَصَرَهُ فَقَالَ أَصَابَ اللَّهُ بِكَ يَا ابْنَ الْخَطَّابِ