The King James Version and margin give different explanations of the last words of this verse. Others explain it of a vestibule or chamber, through which Ehud passed into the porch where the entrance doors were. He locked the doors, took the key with him; and then retired through the midst of the attendants below (or: more probably, through the door which communicated directly with the outside).
Related Commentaries of Judges 3:22
Judges 3:22
22 And the haft also went in after the blade; and the fat closed upon the blade, so that he could not draw the dagger out of his belly; and the dirtf came out.