Word by Word Analysis

لِتَسْتَوُۥا۟ عَلَىٰ ظُهُورِهِۦ ثُمَّ تَذْكُرُوا۟ نِعْمَةَ رَبِّكُمْ إِذَا ٱسْتَوَيْتُمْ عَلَيْهِ وَتَقُولُوا۟ سُبْحَـٰنَ ٱلَّذِى سَخَّرَ لَنَا هَـٰذَا وَمَا كُنَّا لَهُۥ مُقْرِنِينَ 13

That you may settle yourselves upon their backs and then remember the favor of your Lord when you have settled upon them and say, "Exalted is He who has subjected this to us, and we could not have [otherwise] subdued it.