Kaffarah for breaking an oath
Q: One of my friends is addicted to smoking. His father caught him many times. Yesterday his father caught him and he forced him to take an oath on Qur'an. He said "I will not do this thing again" and having his hand on Quran . He is 17 years old . He said I dont know how long my life is. If I break that Oath, what is the Kaffarah? Is there any way to revert it?