﴿ لَّا يُؤَاخِذُكُمُ ٱللَّهُ بِٱللَّغْوِ فِىٓ أَيْمَٰنِكُمْ وَلَٰكِن يُؤَاخِذُكُم بِمَا كَسَبَتْ قُلُوبُكُمْ ۗ وَٱللَّهُ غَفُورٌ حَلِيمٌۭ ﴾

“God will not take you to task for oaths which you may have uttered without thought, but will take you to task [only] for what your hearts have conceived [in earnest]: for God is much-forgiving, forbearing.”

Swayed by anger and obstinacy, sometimes an individual swears an oath that he will not do anything which would benefit a certain person. In ancient times, a variety of such oaths was very common among the Arabs. They swore oaths that they would refrain from such and such a good deed, so that when they were called upon to join in some good act, they would decline, saying that they had already taken an oath to the contrary. To refrain from good acts is in itself bad enough, but swearing to this in the name of God is much worse. For God is a being who is all merciful and all good. Then attaching the name of God to the non-performance of good works is sinful. Perversion at all events is bad. But if perverse acts are done in the name of God, there is a manifold increase in the evil perpetuated.