The Sunnah for the fasting person is to hasten breaking the fast

Question : Please go ahead. Today? Yes. Peace be upon you. She says: Honorable Shaykh, she fasts on Mondays and the white days, but she does not break her fast until after the adhan. She says she is afraid of hearing another mu'adhdhin?

Answer : It is the Sunnah for the fasting person to break his fast. He should hasten to break his fast as soon as he knows that the sun has set, or as soon as he is convinced that it has. If he is convinced that this mu'adhdhin is correct, let him break his fast, and there is no blame on him.