Vowing to stop studying during the night if he passes the exams while he is a soldier

Q: I used to study at night school along with my work in the military service. This studying was very difficult for me. I got bored with studying especially at the time of exams that one day I made a vow saying, 'If Allah blesses me with success in this study, I will never study at night schools again along with my work in the military service.' Now as work has become easier, I want to study during the night shift. It should be noted that I studied for ten days after this vow and I know that Allah says: They (are those who) fulfil (their) vows, and they fear a Day whose evil will be wide-spreading. I need your advice with regard to my situation. What should I do after I made a vow not to study then studied? Do I have to offer a Kaffarah (expiation) or is it sufficient for me to repent to Allah?

A: If the matter is as you have mentioned, you have to offer a Kaffarah for a broken oath and continue your studies at night school. A Kaffarah is fulfilled by feeding ten needy people or clothing them or setting free a Muslim slave. If you are unable to do so, you have to observe fasting for three days.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.