Hudhaifah said that he prayed along with the Prophet ﷺ, and that he said when bowing, “Glory be to my mighty Lord, “ and when he prostrated himself, “Glory be to my most high Lord," when he came to a verse which spoke of mercy, he stopped and made supplication, and when he came to a verse which spoke of punishment, he stopped and sought refuge in Allah.  

قُلْتُ لِسُلَيْمَانَ أَدْعُو فِي الصَّلاَةِ إِذَا مَرَرْتُ بِآيَةِ تَخَوُّفٍ فَحَدَّثَنِي عَنْ سَعْدِ بْنِ عُبَيْدَةَ عَنْ مُسْتَوْرِدٍ عَنْ صِلَةَ بْنِ زُفَرَ عَنْ حُذَيْفَةَ أَنَّهُ صَلَّى مَعَ النَّبِيِّ ﷺ فَكَانَ يَقُولُ فِي رُكُوعِهِ سُبْحَانَ رَبِّيَ الْعَظِيمِ وَفِي سُجُودِهِ سُبْحَانَ رَبِّيَ الأَعْلَى وَمَا مَرَّ بِآيَةِ رَحْمَةٍ إِلاَّ وَقَفَ عِنْدَهَا فَسَأَلَ وَلاَ بِآيَةِ عَذَابٍ إِلاَّ وَقَفَ عِنْدَهَا فَتَعَوَّذَ  

he performed Salat with the Prophet, and that while he was bowing he would say: (Subhana Rabbiyal Azim); "Glorious is my Lord the Magnificent" and while prostrating: (Subhana Rabbiyal A'la) 'Glorious is my Lord the Most High.' And he would not recite an Ayah mentioning mercy, except that he would stop and ask (for mercy), and he would not recite an Ayah mentioning punishment, except that he would stop and seek refuge (with Allah from it).  

أَنَّهُ صَلَّى مَعَ النَّبِيِّ ﷺ فَكَانَ يَقُولُ فِي رُكُوعِهِ سُبْحَانَ رَبِّيَ الْعَظِيمِ وَفِي سُجُودِهِ سُبْحَانَ رَبِّيَ الأَعْلَى وَمَا أَتَى عَلَى آيَةِ رَحْمَةٍ إِلاَّ وَقَفَ وَسَأَلَ وَمَا أَتَى عَلَى آيَةِ عَذَابٍ إِلاَّ وَقَفَ وَتَعَوَّذَ  

he performed Salat with the Prophet, and that while he was bowing he would say: (Subhana Rabbiyal Azim); "Glorious is my Lord the Magnificent" and while prostrating: (Subhana Rabbiyal A'la) 'Glorious is my Lord the Most High.' And he would not recite an Ayah mentioning mercy, except that he would stop and ask (for mercy), and he would not recite an Ayah mentioning punishment, except that he would stop and seek refuge (with Allah from it). (Using translation from Tirmidhī 262)   

أَنَّهُ صَلَّى مَعَ النَّبِيِّ ﷺ فَكَانَ يَقُولُ فِي رُكُوعِهِ سُبْحَانَ رَبِّيَ الْعَظِيمِ وَفِي سُجُودِهِ سُبْحَانَ رَبِّيَ الْأَعْلَى وَمَا مَرَّ بِآيَةِ رَحْمَةٍ إِلَّا وَقَفَ فَسَأَلَ وَلَا بِآيَةِ عَذَابٍ إِلَّا تَعَوَّذَ  

I prayed along with the Messenger of Allah ﷺ and he used to say in his rukūʿ: ‘I glorify the perfection of Allah, the Supreme’ and his sajdah: ‘I glorify the perfection of Allah, the Most High’. He never came to an āyah of mercy except that he paused at it and asked ˹for Allah’s Mercy˺, nor he came to an āyah of punishment except that he sought the refuge ˹in Allah˺ from it.  

صَلَّيْتُ مَعَ رَسُولِ اللهِ ﷺ فَكَانَ يَقُولُ فِي رُكُوعِهِ «سُبْحَانَ رَبِّيَ الْعَظِيمِ» وَفِي سُجُودِهِ «سُبْحَانَ رَبِّيَ الْأَعْلَى» قَالَ وَمَا مَرَّ بِآيَةِ رَحْمَةٍ إِلَّا وَقَفَ عِنْدَهَا فَسَأَلَ وَلَا آيَةِ عَذَابٍ إِلَّا تَعَوَّذَ مِنْهَا