لِتَسْتَوُۥا۟ عَلَىٰ ظُهُورِهِۦ ثُمَّ تَذْكُرُوا۟ نِعْمَةَ رَبِّكُمْ إِذَا ٱسْتَوَيْتُمْ عَلَيْهِ وَتَقُولُوا۟ سُبْحَـٰنَ ٱلَّذِى سَخَّرَ لَنَا هَـٰذَا وَمَا كُنَّا لَهُۥ مُقْرِنِينَ Qur’an Az-Zukhruf (43:13)Litastawoo AAal a th uhoorihi thumma ta th kuroo niAAmata rabbikum i tha istawaytum AAalayhi wataqooloo sub ha na alla th ee sakhkhara lan a h atha wam a kunn a lahu muqrineen a
Lit., "over its backs" - i.e., according to all classical commentators, the "backs" of the above-mentioned animals and ships alike, the singular form of the pronoun ("its") relating to the collective entity comprised in the concept of "all whereon you ride" (ma tarkabun): in other words, "all that you use or may use by way of transport". As regards my rendering of li-tasta'u as "so that you might gain mastery", I should like to point out that the verb istawa (lit., "he established himself") has often the connotation adopted by me: see Jawhari, Raghib and Lisan al-'Arab, art. sawa; also Lane IV, 1478.
See last note. People of understanding attribute all good to its true and original source viz.: Allah.