Fulfilling a promise

A: You should fulfill your promise if you can, but if you are not able to; (Part No. 26; Page No. 146) you are to offer Kaffarah which is to feed ten needy people, clothe them, or free a believing bondsman. However, if you cannot, you must fast for three days.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.