2:184For a specified number of days. But whoever among you is sick, or on a journey, then a number of other days. For those who are able: a ransom of feeding a needy person. But whoever volunteers goodness, it is better for him. But to fast is best for you, if you only knew.

2:185Ramadan is the month in which the Quran was revealed. Guidance for humanity, and clear portents of guidance, and the Criterion. Whoever of you witnesses the month, shall fast it. But whoever is sick, or on a journey, then a number of other days. God desires ease for you, and does not desire hardship for you, that you may complete the number, and celebrate God for having guided you, so that you may be thankful.

2:283If you are on a journey, and cannot find a scribe, then a security deposit should be handed over. But if you trust one another, let the trustee fulfill his trust, and let him fear God, his Lord. And do not conceal testimony. Whoever conceals it is sinner at heart. God is aware of what you do.