[Then We have made it easy] - meaning: the Qur'an [by your tongue] - meaning: the Prophet. If God had not made it easy by the tongue of Muhammad, they would not have been able to recite it nor understand it [that perhaps they might remember] - so that they may take heed.
﴿فَإِنَّمَا يسرناه﴾ يَعْنِي: الْقُرْآن ﴿بلسانك﴾ يَعْنِي: النَّبِي، لَوْلَا أَن الله يسره بِلِسَان محمدٍ مَا كَانُوا ليقرءوه وَلَا يفقهوه ﴿لَعَلَّهُم يتذكرون﴾ لكَي يتذكروا
