Quran 2:183 — The Heifer (Al-Baqarah)

O you who believe, fasting is decreed for you, as it was decreed for those before you, that you may attain salvation.

[2:182] If one sees gross injustice or bias on the part of a testator, and takes corrective action to restore justice to the will, he commits no sin. GOD is Forgiver, Most Merciful.

[2:184] Specific days (are designated for fasting); if one is ill or traveling, an equal number of other days may be substituted. Those who can fast, but with great difficulty, may substitute feeding one poor person for each day of breaking the fast. If one volunteers (more righteous works), it is better. But fasting is the best for you, if you only knew.