Swearing not to do something then doing it

Q: What is the ruling if someone swears not to do a lawful act but his lust then motivates him to do it? Is there any sin on him? May Allah guide you to that which is good and protect you from evil! Indeed Allah is All-Hearing and Responsive.

A: If the reality is as mentioned, this person has to offer Kaffarah (expiation) for breaking his oath. The Kaffarah involves feeding ten Miskins (needy persons), or providing them with clothing, or emancipating a believing slave. If none of these is affordable, he must observe Sawm (Fast) for three days. There is no sin on him.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.