What is the ruling on the owner of a shop or one of its employees remaining in it during congregational prayer at the mosque opposite the shop, and is it permissible to miss the first congregational prayer for this reason?

Performing prayers with the Muslim congregation is obligatory, and falling behind is a characteristic of the hypocrites. However, it is permissible to miss congregational prayer when there is fear of losing money, such as someone whose work requires them to guard it and it is difficult to close their shop; such a person is excused.