Surah Al-Ma'idah 5:89

ﲋ ﲌ ﲍ ﲎ ﲏ ﲐ ﲑ ﲒ ﲓ ﲔ ﲕ ﲖ ﲗ ﲘ ﲙ ﲚ ﲛ ﲜ ﲝ ﲞ ﲟ ﲠ ﲡ ﲢ ﲣ ﲤ ﲥ ﲦ ﲧ ﲨ ﲩ ﲪ ﲫ ﲬ ﲭ ﲮ ﲯ ﲰ ﲱ ﲲ ﲳ ﲴ ﲵ ﲶ ﲷ ﲸ ﲹ ﲺ ﲻ ﲼ

Allah will not impose blame upon you for what is meaningless in your oaths, but He will impose blame upon you for [breaking] what you intended of oaths. So its expiation is the feeding of ten needy people from the average of that which you feed your [own] families or clothing them or the freeing of a slave. But whoever cannot find [or afford it] - then a fast of three days [is required]. That is the expiation for oaths when you have sworn. But guard your oaths. Thus does Allah make clear to you His verses that you may be grateful.