A man in Ramadan thought that the time for Fajr had not yet entered while he was eating, then he heard the sound of the imam praying and realized that he had been eating after the time for Fajr had entered; does he have to make up the fast?

The questioner : If this person was asked about it before, meaning I was asked about it a few days ago in a mosque, if a person does not know that the time has entered, he thought that the time had not entered and he was eating, then it became clear to him that he had heard the sound of the imam saying the takbir of the opening of Fajr prayer or the iqamah, so he knew that he had eaten outside its time, if there is no negligence, there is no negligence or shortcoming in this matter, is such a situation excused?

The Shaykh : ... .

The questioner : He is excused, and he does not have to make up the fast.