Divine knowledge of sincerity and piety

لَا يَسْتَـْٔذِنُكَ ٱلَّذِينَ يُؤْمِنُونَ بِٱللَّهِ وَٱلْيَوْمِ ٱلْـَٔاخِرِ أَن يُجَـٰهِدُوا۟ بِأَمْوَٰلِهِمْ وَأَنفُسِهِمْ ۗ وَٱللَّهُ عَلِيمٌۢ بِٱلْمُتَّقِينَ

Those who believe in Allāh and the Last Day would not ask permission of you to be excused from striving [i.e., fighting] with their wealth and their lives. And Allāh is Knowing of those who fear Him.