كُلُّ نَفْسٍ ذَآئِقَةُ ٱلْمَوْتِ ۗ وَنَبْلُوكُم بِٱلشَّرِّ وَٱلْخَيْرِ فِتْنَةً ۖ وَإِلَيْنَا تُرْجَعُونَ

Those who were opponents of the Prophet Muhammad in Makkah were more affluent and powerful in terms of material resources. They enjoyed respect and positions of superiority in the society of those days. According to them, this difference meant that they were on the right path and the Prophet Muhammad on the wrong path. But an excess or paucity of worldly effects bears no relation to superiority or inferiority, being purely for the purpose of trial. It is a trial imposed at the behest of God. If, after acquiring worldly resources, a man thinks highly of himself, he is as if proving himself unworthy of this blessing. The result will be that after death, in the life hereafter, he will be totally deprived of his riches. The people of Makkah were engaged in strenuous efforts to defeat the Prophet Muhammad, to the extent that they wanted to eliminate him somehow in order to nip his mission in the bud. God says that those who conspired against the Prophet had forgotten the fact that those who dug a grave for others, have ultimately to enter the grave themselves. Then, after death, when they faced their Real Lord, what would they do?

— Source: Tazkirul Quran (Maulana Wahiduddin Khan) via Quran.com (21:35)