﴿ وَقَالُوا۟ مَا هِىَ إِلَّا حَيَاتُنَا ٱلدُّنْيَا نَمُوتُ وَنَحْيَا وَمَا يُهْلِكُنَآ إِلَّا ٱلدَّهْرُ ۚ وَمَا لَهُم بِذَٰلِكَ مِنْ عِلْمٍ ۖ إِنْ هُمْ إِلَّا يَظُنُّونَ ﴾

“And yet they say: “There is nothing beyond our life in this world. We die as we come to life, and nothing but time destroys us.” But of this they have no knowledge whatever: they do nothing but guess.”

(And they say) i.e. the people of Mecca: (There is naught but our life of the world) in this life of the world; (we die and we live) they meant: the fathers die and the sons live, (and naught destroyeth us save time) i.e. the length of nights, days, months, and hours; (when they have no knowledge) proof or argument (whatsoever of (all) that) which they say; (they do but guess) they only guess when they say this.