When the Friday prayer is called · Al-Jumu'ah 62:9

9. O you who have faith in Allah, and who act on what He has ordained for you, when the caller to prayer calls out on the day of Friday after the speaker ascends the pulpit, then hurry to the mosques to attend the speech and the prayer and leave trading, so that it does not distract you from obedience. That hurrying and leaving out trading after the call for the Friday prayer is better for you, O believers. If you know that, then fulfil what Allah has instructed you to do.