وَلِيَعْلَمَ ٱلَّذِينَ نَافَقُوا۟ ۚ وَقِيلَ لَهُمْ تَعَالَوْا۟ قَـٰتِلُوا۟ فِى سَبِيلِ ٱللَّهِ أَوِ ٱدْفَعُوا۟ ۖ قَالُوا۟ لَوْ نَعْلَمُ قِتَالًۭا لَّٱتَّبَعْنَـٰكُمْ ۗ هُمْ لِلْكُفْرِ يَوْمَئِذٍ أَقْرَبُ مِنْهُمْ لِلْإِيمَـٰنِ ۚ يَقُولُونَ بِأَفْوَٰهِهِم مَّا لَيْسَ فِى قُلُوبِهِمْ ۗ وَٱللَّهُ أَعْلَمُ بِمَا يَكْتُمُونَ
“and expose the hypocrites. When it was said to them, 'Come fight in the cause of Allah, or [at least] defend yourselves,' they replied, 'If we had known there was fighting, we would have definitely gone with you.' They were closer to disbelief than to belief on that day — for saying with their mouths what was not in their hearts. Allah is All-Knowing of what they hide”
Exposing the hypocrites who withdrew on the march to Uhud.