"I prayed with the Messenger of Allah ﷺ, and he bowed and said when bowing: 'Subhana Rabbial-azim (Glory be to my Lord Almighty).' And when prostrating: 'Subhana Rabbial-'Ala (Glory be to my Lord Most High).'"  

صَلَّيْتُ مَعَ رَسُولِ اللَّهِ ﷺ فَرَكَعَ فَقَالَ فِي رُكُوعِهِ سُبْحَانَ رَبِّيَ الْعَظِيمِ وَفِي سُجُودِهِ سُبْحَانَ رَبِّيَ الأَعْلَى