(Thouba) 9 : 81
فَرِحَ الْمُخَلَّفُونَ بِمَقْعَدِهِمْ خِلَافَ رَسُولِ اللَّهِ وَكَرِهُوا أَنْ يُجَاهِدُوا بِأَمْوَالِهِمْ وَأَنْفُسِهِمْ فِي سَبِيلِ اللَّهِ وَقَالُوا لَا تَنْفِرُوا فِي الْحَرِّ ۗ قُلْ نَارُ جَهَنَّمَ أَشَدُّ حَرًّا ۚ لَوْ كَانُوا يَفْقَهُونَ
Those who sat behind Messenger of Lord Allah and rejoiced in their staying and hated to do Jihad with their wealth and their soul in the cause of Allah and they said: “Don’t go forth in this heat"; You say: "The Fire of Hell is more severe in heat" if they were understanding.