When me and my bother are praying after we finish the maghrib salat my brother sees the time If there is more time he does again and I keep on telling him not to do it but he wants a written proof for it so can you help me.

Assalamu Alaikum

I am sorry, I don't know the answer to this. And I can't seem to find the answer, many say that no one ever thinks about it so its not really something people seem to know.

I would ask your Imam. He would be able to help you with this better than I would.