Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 2 years ago

If he has made an oath to pay certain amount if he commits that sin, it becomes obligatory on him to fulfill his oath if he committed that sin, and pay that amount or what ever he can, then to pay the rest when ever he can in the future. It remains as a loan on him which must be paid as soon as he is able to pay it.