Is it obligatory for the Friday preacher to order a person who enters to pray before sitting down?

The questioner:
May Allah reward you, Honorable Shaykh. This questioner says: Is it obligatory for every Friday preacher to order a person who enters and sits down to stand up and pray two rak'ahs?

The Shaykh:
Without a doubt. He should alert the people and teach them that it is not permissible to sit down. If a person enters while the imam is delivering the sermon, it is not permissible for him to sit down until he prays two rak'ahs.

The questioner:
He says: When does the time for the greeting of the mosque pass?

The Shaykh:
When does what pass?

The questioner:
The time for the greeting of the mosque.

The Shaykh:
It does not pass, my brother. It does not pass. If he sits down, he stands up and prays two rak'ahs. This is a man who sat down, and the Prophet (peace and blessings be upon him) said to him: Stand up and pray two rak'ahs. It did not pass.