﴿ أَيَّامًۭا مَّعْدُودَٰتٍۢ ۚ فَمَن كَانَ مِنكُم مَّرِيضًا أَوْ عَلَىٰ سَفَرٍۢ فَعِدَّةٌۭ مِّنْ أَيَّامٍ أُخَرَ ۚ وَعَلَى ٱلَّذِينَ يُطِيقُونَهُۥ فِدْيَةٌۭ طَعَامُ مِسْكِينٍۢ ۖ فَمَن تَطَوَّعَ خَيْرًۭا فَهُوَ خَيْرٌۭ لَّهُۥ ۚ وَأَن تَصُومُوا۟ خَيْرٌۭ لَّكُمْ ۖ إِن كُنتُمْ تَعْلَمُونَ ﴾

“[fasting] during a certain number of days. But whoever of you is ill, or on a journey, [shall fast instead for the same] number of other days; and [in such cases] it is incumbent upon those who can afford it to make sacrifice by feeding a needy person. And whoever does more good than he is bound to do does good unto himself thereby; for to fast is to do good unto yourselves - if you but knew it.”

For days numbered; and if any of you be sick, or be on a journey, then a number of other days; and for those who are able to do it, a redemption: the feeding of a poor man. For him who volunteers good; that is good for him; but that you should fast is better for you, if you but knew.