Joseph was no longer able to control his feelings in front of his servants, so he ordered them all to leave the room. No one else was with him when Joseph told his brothers who he was.

But Ehud himself turned back at the carved stones near Gilgal, went back to Eglon, and said, "Your Majesty, I have a secret message for you." So the king ordered his servants, "Leave us alone!" And they all went out.

Those who do evil things hate the light and will not come to the light, because they do not want their evil deeds to be shown up.