“I once asked abu ‘Abd Allah (a.s.), about the case of a man who vows to do a certain thing then finds out that not doing it is better. If he disregards it, he is afraid of committing a sin. Can he disregard it? He (the Imam) said, ‘Have you not heard the words of the Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause, “If you find something better than that for which you have taken an oath, then you can disregard it.’””