“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, and if he did not disregard it he is afraid of committing a sin; if he can 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 you can disregard it.’””