Went in with him to the marriage - The “marriage-feast.” The marriage ceremony took place before the bride left her father’s house, but a feast was given at the house of her husband, which was also called the “marriage,” or a part of the marriage solemnities. This part of the parable doubtless represents the entrance of those who “are ready,” or prepared, into the kingdom of God, when the Son of man shall come. They will be ready who have repented of their sins; who truly believe on the Lord Jesus; who live a holy life; and who wait for his coming. See Mark 16:16; John 5:24; Acts 3:19; Revelation 22:11; 2 Peter 3:11-12; 1 Timothy 6:17-19; 2 Timothy 4:6-8.
The door was shut - No more could be admitted to the marriage-feast. So, when the truly righteous shall all be received into heaven, the door will be closed against all others. There will be no room for preparation afterward, Revelation 22:11; Ecclesiastes 11:3; Ecclesiastes 9:10; Matthew 25:46.