allah does not take you to task for the oaths you utter vainly but he will certainly take you to task for the oaths you have sworn in earnest. the expiation is either to feed ten needy persons with more or less the same food as you are wont to give to your families or to clothe them or to set free from bondage the neck of one man and he who does not find the means shall fast for three days. this shall be the expiation for your oaths whenever you have sworn but do keep your oaths. thus does allah make clear to you his commandments maybe you will be grateful.
لا يؤاخذكم الله باللغو في أيمانكم ولكن يؤاخذكم بما عقدتم الأيمان فكفارته إطعام عشرة مساكين من أوسط ما تطعمون أهليكم أو كسوتهم أو تحرير رقبة فمن لم يجد فصيام ثلاثة أيام ذلك كفارة أيمانكم إذا حلفتم واحفظوا أيمانكم كذلك يبين الله لكم آياته لعلكم تشكرون