2:184
أَيَّامًا مَّعْدُودَٰتٍ فَ مَن كَانَ مِن كُم مَّرِيضًا أَوْ عَلَىٰ سَفَرٍ فَ عِدَّةٌ مِّنْ أَيَّامٍ أُخَرَ وَ عَلَى ٱلَّذِينَ يُطِيقُ ونَ هُۥ فِدْيَةٌ طَعَامُ مِسْكِينٍ فَ مَن تَطَوَّعَ خَيْرًا فَ هُوَ خَيْرٌ لَّ هُۥ وَ أَن تَصُومُ وا۟ خَيْرٌ لَّ كُمْ إِن كُن تُمْ تَعْلَمُ ونَ
[Fasting for] a limited number of days. So whoever among you is ill or on a journey [during them] - then an equal number of 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 excess - it is better for him. But to fast is best for you, if you only knew.
2:185
شَهْرُ رَمَضَانَ ٱلَّذِىٓ أُنزِلَ فِي هِ ٱلْ قُرْءَانُ هُدًى لِّ ل نَّاسِ وَ بَيِّنَٰتٍ مِّنَ ٱلْ هُدَىٰ وَ ٱلْ فُرْقَانِ فَ مَن شَهِدَ مِن كُمُ ٱل شَّهْرَ فَ لْ يَصُمْ هُ وَ مَن كَانَ مَرِيضًا أَوْ عَلَىٰ سَفَرٍ فَ عِدَّةٌ مِّنْ أَيَّامٍ أُخَرَ يُرِيدُ ٱللَّهُ بِ كُمُ ٱلْ يُسْرَ وَ لَا يُرِيدُ بِ كُمُ ٱلْ عُسْرَ وَ لِ تُكْمِلُ وا۟ ٱلْ عِدَّةَ وَ لِ تُكَبِّرُ وا۟ ٱللَّهَ عَلَىٰ مَا هَدَىٰ كُمْ وَ لَعَلَّ كُمْ تَشْكُرُ ونَ
The month of Ramadhan [is that] in which was revealed the Qur'an, a guidance for the people and clear proofs of guidance and criterion. So whoever sights [the new moon of] the month, let him fast it; and whoever is ill or on a journey - then an equal number of other days. Allah intends for you ease and does not intend for you hardship and [wants] for you to complete the period and to glorify Allah for that [to] which He has guided you; and perhaps you will be grateful.
33:35
إِنَّ ٱلْ مُسْلِمِينَ وَ ٱلْ مُسْلِمَٰتِ وَ ٱلْ مُؤْمِنِينَ وَ ٱلْ مُؤْمِنَٰتِ وَ ٱلْ قَٰنِتِينَ وَ ٱلْ قَٰنِتَٰتِ وَ ٱل صَّٰدِقِينَ وَ ٱل صَّٰدِقَٰتِ وَ ٱل صَّٰبِرِينَ وَ ٱل صَّٰبِرَٰتِ وَ ٱلْ خَٰشِعِينَ وَ ٱلْ خَٰشِعَٰتِ وَ ٱلْ مُتَصَدِّقِينَ وَ ٱلْ مُتَصَدِّقَٰتِ وَ ٱل صَّٰٓئِمِينَ وَ ٱل صَّٰٓئِمَٰتِ وَ ٱلْ حَٰفِظِينَ فُرُوجَ هُمْ وَ ٱلْ حَٰفِظَٰتِ وَ ٱل ذَّٰكِرِينَ ٱللَّهَ كَثِيرًا وَ ٱل ذَّٰكِرَٰتِ أَعَدَّ ٱللَّهُ لَ هُم مَّغْفِرَةً وَ أَجْرًا عَظِيمًا
Indeed, the Muslim men and Muslim women, the believing men and believing women, the obedient men and obedient women, the truthful men and truthful women, the patient men and patient women, the humble men and humble women, the charitable men and charitable women, the fasting men and fasting women, the men who guard their private parts and the women who do so, and the men who remember Allah often and the women who do so - for them Allah has prepared forgiveness and a great reward.