Judges 3:23-25

23As Ehud went out into the vestibule, he closed the doors of the upper room behind him and locked them.

24When Ehud had left, Eglon’s servants came and saw the locked doors of the upper room. They said, “He must be relieving himself in the well-ventilated inner room.”

25They waited so long they were embarrassed, but he still did not open the doors of the upper room. Finally they took the key and opened the doors. Right before their eyes was their master, sprawled out dead on the floor!