Departing from 'Arafah before the adhan after the sun has set behind the mountains

The questioner:
Honorable Shaykh, what is the ruling on the one who leaves 'Arafah ten minutes before the adhan, after seeing that the mountains have hidden the sun?

The Shaykh:
Is the issue about the adhan or about the setting of the sun? If the sun sets in the valleys or in the mountains, if it sets in the valleys, where is that here, at the time of departing from 'Arafah? As for the Arabs, but if it sets behind a mountain or a ridge, yes, that is correct.

The questioner:
Honorable Shaykh.

The Shaykh:
Whether it sets and the night approaches, if it sets and the night approaches from the east, then the time for departing from 'Arafah has arrived, even if he does not hear the adhan. This is tied to the setting of the sun.