What must a person do as a result of breaking his covenant with God after repeatedly committing a sin?

A covenant with Allah Almighty is considered a form of vow (nadhr) and oath (yamin). Whoever breaks a covenant with Allah must offer expiation for an oath (kaffarat yamin). If the vow aims to encourage an action or prevent something, its ruling is that of an oath; if it is not fulfilled, expiation for an oath becomes obligatory.

One expiation is due for actions that were subject to the oath if they concerned a single act. If they concerned multiple acts, then an expiation is required for each act. The expiation for an oath is: feeding ten needy persons, or clothing them, or freeing a slave. Whoever cannot find these must fast for three days.