فَرِحَ الْمُخَلَّفُونَ بِمَقْعَدِهِمْ خِلَافَ رَسُولِ اللَّهِ وَكَرِهُوا أَن يُجَاهِدُوا بِأَمْوَالِهِمْ وَأَنفُسِهِمْ فِي سَبِيلِ اللَّهِ وَقَالُوا لَا تَنفِرُوا فِي الْحَرِّ ۗ قُلْ نَارُ جَهَنَّمَ أَشَدُّ حَرًّا ۚ لَّوْ كَانُوا يَفْقَهُونَ (81)
(9:81) Those who were allowed to remain behind, were happy that they had not gone with Allah's Messenger, and had stayed at home, for they did not like to do Jihad in the Way of Allah with their possessions and their persons. They said to the people, "Do not go forth in this heat." Say to them, "The Fire of Hell is much hotter than this"; would that they understood this!