مَا ٱتَّخَذَ ٱللَّهُ مِن وَلَدٖ وَمَا كَانَ مَعَهُۥ مِنۡ إِلَٰهٍۚ إِذٗا لَّذَهَبَ كُلُّ إِلَٰهِۭ بِمَا خَلَقَ وَلَعَلَا بَعۡضُهُمۡ عَلَىٰ بَعۡضٖۚ سُبۡحَٰنَ ٱللَّهِ عَمَّا يَصِفُونَ ٩١
Allāh has not taken any son, nor has there ever been with Him any deity. [If there had been], then each deity would have taken what it created, and some of them would have [sought to] overcome others. Exalted is Allāh above what they describe [concerning Him].
Translation: Saheeh International (English)
Each word's meaning and sound
Allah has not taken a child as the disbelievers claim, nor is there any true deity alongside Him. If there were to be any true deity alongside Him, every deity would take his share of the creation he made and they would dominate one another, causing the order of the Universe to become corrupt. The reality is that none of this has occurred, proving that the true deity is Allah alone. He is pure and holy of what the idolaters describe Him with, namely partners and children which are unbefitting for Him.
Al-Mukhtasar in interpreting the Noble Quran