The ruling on the fast of one who hears the Fajr adhan while eating the pre-dawn meal

Question:
May Allah reward you, Honorable Shaykh. Among the questions, a brother says: I tried to determine the time of Fajr as best as I could, and I thought the night was still there, so I got up for the pre-dawn meal. While I was eating, I heard the Fajr adhan, so I spat out the mouthful and intended to fast. Is my fast valid?

Answer:
Yes, as long as you fasted with the beginning of the adhan and abstained from eating, and the mu'adhdhin calls the adhan at the actual dawn without delaying. However, if the mu'adhdhin delays beyond the actual dawn, do not act according to his adhan. But if he calls the adhan at the actual dawn and you abstained from the moment the adhan began, that is what is obligatory for you. Yes.