What is incumbent upon a smoker who swore an oath to quit smoking, then broke it, then offered expiation for the oath, and returned to smoking again? And is he required to offer expiation for every cigarette? And how can he retract his oath while maintaining his intention to quit smoking?

You must repent sincerely from the sin and breaking your oath, for swearing to abandon a sin makes breaking that oath forbidden.

If you swore an oath and broke it, then expiated for it, and then swore another oath and broke it, another expiation is incumbent upon you.

If the oath necessitates repetition, such as saying, "By Allah, I will not smoke," then every time you violate it, an expiation becomes incumbent upon you, and it is not waived unless you are unable to perform any of its components.

The expiation for an oath is feeding ten poor people, or clothing them, or freeing a slave; and whoever cannot find [the means], then fasting three days.