“How did you get in here without wedding clothes?”
But when the king came in to see the guests, he spotted a man who was not dressed in wedding clothes. 'Friend,' he asked, 'how did you get in here without wedding clothes?' But the man was speechless. (Matthew 22:11–13 BSB)
What it sounds like today
Brutally unfair: the man was dragged in off the street; how could he have dressed for it?
The cultural key
Festal dress for a royal feast was non-negotiable: clean, white or freshly washed garments honored the host, and appearing in road-dirty work clothes insulted him. Many commentators suggest kings supplied garments to guests (making the refusal pure contempt); the evidence for that custom is thin, so hold it loosely; but even without it, the man had time and means (the others managed) and offers no excuse: he is 'speechless.'
Recovered meaning
The invitation is scandalously open, with 'bad and good' swept in from the roads, but entering is not the same as honoring the host. Something is still owed: the free guest who can't be bothered to change insults the wedding. Grace has a dress code, and it isn't status; the other street guests met it.