Verse 13

لِتَسْتَوُۥا۟ عَلَىٰ ظُهُورِهِۦ ثُمَّ تَذْكُرُوا۟ نِعْمَةَ رَبِّكُمْ إِذَا ٱسْتَوَيْتُمْ عَلَيْهِ وَتَقُولُوا۟ سُبْحَـٰنَ ٱلَّذِى سَخَّرَ لَنَا هَـٰذَا وَمَا كُنَّا لَهُۥ مُقْرِنِينَ

In order that you may sit comfortably on their backs, and that you may remember your Lord’s blessing for making it comfortable for you and say, constant glory to the One who subdued these for us, otherwise we could have never achieved this.