AL MAA-IDAH — Ayat 89
لاَ يُؤَاخِذُكُمُ اللّهُ بِاللَّغْوِ فِي أَيْمَانِكُمْ وَلَـكِن يُؤَاخِذُكُم بِمَا عَقَّدتُّمُ الأَيْمَانَ فَكَفَّارَتُهُ إِطْعَامُ عَشَرَةِ مَسَاكِينَ مِنْ أَوْسَطِ مَا تُطْعِمُونَ أَهْلِيكُمْ أَوْ كِسْوَتُهُمْ أَوْ تَحْرِيرُ رَقَبَةٍ فَمَن لَّمْ يَجِدْ فَصِيَامُ ثَلاَثَةِ أَيَّامٍ ذَلِكَ كَفَّارَةُ أَيْمَانِكُمْ إِذَا حَلَفْتُمْ وَاحْفَظُواْ أَيْمَانَكُمْ كَذَلِكَ يُبَيِّنُ اللّهُ لَكُمْ آيَاتِهِ لَعَلَّكُمْ تَشْكُرُونَ
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.
Tafsir Ibnu Katsir
لاَ يُؤَاخِذُكُمُ اللَّهُ بِاللَّغْوِ فِى أَيْمَـنِكُمْ وَلَـكِن يُؤَاخِذُكُم بِمَا عَقَّدتُّمُ الاٌّيْمَـنَ فَكَفَّارَتُهُ إِطْعَامُ عَشَرَةِ مَسَـكِينَ مِنْ أَوْسَطِ مَا تُطْعِمُونَ أَهْلِيكُمْ أَوْ كِسْوَتُهُمْ أَوْ تَحْرِيرُ رَقَبَةٍ فَمَن لَّمْ يَجِدْ فَصِيَامُ ثَلَـثَةِ أَيَّامٍ ذلِكَ كَفَّارَةُ أَيْمَـنِكُمْ إِذَا حَلَفْتُمْ وَاحْفَظُواْ أَيْمَـنَكُمْ كَذلِكَ يُبَيِّنُ اللَّهُ لَكُمْ ءَايَـتِهِ لَعَلَّكُمْ تَشْكُرُونَ
89. Allah will not punish you for what is unintentional in your oaths, but He will punish you for your deliberate oaths; for its expiation feed ten poor, on a scale of the Awsat of that with which you feed your own families; or clothe them; or free a slave. But whosoever cannot afford, then he should fast for three days. That is the expiation for the oaths when you have sworn. And protect your oaths. Thus Allah makes clear to you His Ayat that you may be grateful. We mentioned the subject of unintentional oaths in Surat Al-Baqarah, all praise and thanks are due to Allah, and so we do not need to repeat it here. We also mentioned that the Laghw in oaths refers to one's saying, â€No by Allah,'' or, â€Yes, by Allah,'' unintentionally.  Allah said,