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 1 year ago

You can not take back your promise to Allah (SWT) as far as you are able to fulfill it even with reasonable difficulty. If you don't fulfill your promise to Allah, it will a sinful act, and you must face a heavy Kaffara which is called Kaffara of breaking the promise كفارة العهد which is feeding sixty poor believers.