Al-Baqara 2:184

[Fasting is for] a specific number of days; but if anyone of you is ill or on a journey, he should make up for those days. As for those who can only fast with hardship, compensation can be made by feeding a needy person [for each day]. But anyone who volunteers to give more, it is better for him. Yet fasting is better for you, if only you knew[81].

[81] The provision of this verse has been abrogated by the next verse: 185, with few exceptions, i.e., very old person, or pregnant, etc.

[Fasting for] a limited number of days. So whoever among you is ill or on a journey [during them] - then an equal number of other days [are to be made up]. And upon those who are able [to fast, but with hardship] - a ransom [as substitute] of feeding a poor person [each day]. And whoever volunteers good [i.e., excess] - it is better for him. But to fast is best for you, if you only knew.

184. [Observing Saum (fasts)] for a fixed number of days, but if any of you is ill or on a journey, the same number (should be made up) from other days. And as for those who can fast with difficulty, (e.g. an old man), they have (a choice either to fast or) to feed a Miskîn (poor person) (for every day). But whoever does good of his own accord, it is better for him. And that you fast is better for you if only you know.[37]

[37] (V.2:184) The provision of this Verse has been abrogated by the next Verse: 185, with few exceptions, i.e., very old person, or pregnancy, etc.

(Fast) a certain number of days; and (for) him who is sick among you, or on a journey, (the same) number of other days; and for those who can afford it there is a ransom: the feeding of a man in need - but whoso doeth good of his own accord, it is better for him: and that ye fast is better for you if ye did but know -