﴿ لَّيْسَ عَلَى ٱلْأَعْمَىٰ حَرَجٌۭ وَلَا عَلَى ٱلْأَعْرَجِ حَرَجٌۭ وَلَا عَلَى ٱلْمَرِيضِ حَرَجٌۭ ۗ وَمَن يُطِعِ ٱللَّهَ وَرَسُولَهُۥ يُدْخِلْهُ جَنَّٰتٍۢ تَجْرِى مِن تَحْتِهَا ٱلْأَنْهَٰرُ ۖ وَمَن يَتَوَلَّ يُعَذِّبْهُ عَذَابًا أَلِيمًۭا ﴾

“No blame attaches to the blind, nor does blame attach to the lame, nor does blame attach to the sick [for staying away from a war in God’s cause]; but whoever heeds [the call of] God and His Apostle [in deed or in heart], him will He admit into gardens through which running waters flow; whereas him who turns away will He chastise with grievous chastise­ment.”

Those who had shown weakness on the occasion of Hudaybiyah were deprived of the reward resulting therefrom, but still the door was not closed to them, because the campaign to promote Monotheism was to face many difficult situations. They were told that if they proved that they were imbued with the spirit of sacrifice on future occasions, they would once again be entitled to the Grace of God. A test of this kind decides whether a man is a believer or a hypocrite. Only those who have some real difficulty are exempt from it. God pardons an error forced on a person because of circumstances which are beyond his control. But any other kind of shortcoming is not pardonable in the eyes of God.