Judges 3:23-25

23Then Ehud closed and locked the doors of the room and escaped down the latrine.

24After Ehud was gone, the king’s servants returned and found the doors to the upstairs room locked. They thought he might be using the latrine in the room,

25so they waited. But when the king didn’t come out after a long delay, they became concerned and got a key. And when they opened the doors, they found their master dead on the floor.