9:81
فَرِحَ ٱلْمُخَلَّفُونَ بِمَقْعَدِهِمْ خِلَـٰفَ رَسُولِ ٱللَّهِ وَكَرِهُوٓا۟ أَن يُجَـٰهِدُوا۟ بِأَمْوَٰلِهِمْ وَأَنفُسِهِمْ فِى سَبِيلِ ٱللَّهِ وَقَالُوا۟ لَا تَنفِرُوا۟ فِى ٱلْحَرِّ ۗ قُلْ نَارُ جَهَنَّمَ أَشَدُّ حَرًّا ۚ لَّوْ كَانُوا۟ يَفْقَهُونَ
9:81
Those who did not take part in the battle (of Tabuk), were glad about their staying home against the order of the Messenger of God. They did not want to fight for the cause of God with their property and in person and said, "Do not march (to the battle) on the hot days." (Muhammad), tell them, "The heat of hell fire is much more severe, if only you would understand." - Muhammad Sarwar (English)