If you enter the mosque with a person, is it obligatory to fill the gap in the row, or to pray in the second row with the person you entered with?

The questioner : Okay, Shaykh, there is a second question, meaning a final one. If you enter the mosque and find that there is one gap left in the first row, and another person enters with you and gestures to you to stand with him, do you fill the gap or stand with the other person?

The Shaykh : No, no, stand with the second person.

The questioner : And the gap.

The Shaykh : The gap needs someone to fill it.

The presenter : May Allah reward you with good, O Shaykh. Peace be upon you.

The Shaykh : Praise be to Allah.