﴿ 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.”

لَّيْسَ عَلَى الْأَعْمَىٰ حَرَ‌جٌ (There is no blame on the blind, nor is there any blame on the lame, nor is there any blame on the sick...48:17) Sayyidna Ibn ` Abbas ؓ reports that when some sincere Muslims who were physically unable to fight read the concluding clause of verse 16: وَإِن تَتَوَلَّوْا كَمَا تَوَلَّيْتُم مِّن قَبْلُ يُعَذِّبْكُمْ عَذَابًا أَلِيمًا . “ And if you turn away, as you had turned away before, He will punish you with a painful punishment. [ 48:16] " they expressed their concern about the warning. Verse [ 17] was revealed to exempt them from the injunction of jihad. These people included blind, lame or sick persons (Qurtubi). And Allah knows best!