﴿ فَرِحَ ٱلْمُخَلَّفُونَ بِمَقْعَدِهِمْ خِلَٰفَ رَسُولِ ٱللَّهِ وَكَرِهُوٓا۟ أَن يُجَٰهِدُوا۟ بِأَمْوَٰلِهِمْ وَأَنفُسِهِمْ فِى سَبِيلِ ٱللَّهِ وَقَالُوا۟ لَا تَنفِرُوا۟ فِى ٱلْحَرِّ ۗ قُلْ نَارُ جَهَنَّمَ أَشَدُّ حَرًّۭا ۚ لَّوْ كَانُوا۟ يَفْقَهُونَ ﴾

“THOSE [hypocrites] who were left behind rejoiced in their staying away [from war] after [the departure of] God's Apostle, for they hated the thought of striving with their possessions and their lives in God's cause; and they had [even] said [to the others], "Do not go forth to war in this heat!" Say: "The fire of hell is hotter by far!" Had they but grasped this truth!”

Those who were left behind from the journey to Tabūk rejoiced at remaining behind the Messenger of God and were averse to striving with their wealth and their lives in the way of God. And they said that is they said to one another ‘Do not go forth do not set off to join the fight in the heat!’ Say ‘The fire of Hell is hotter than Tabūk and more worthy for them to guard against by not staying behind did they but understand’ this they would not have stayed behind.