Judges 3:23-25

23Then Ehud went out by the porch, shut the doors of the roof chamber on him, and locked them.

24After he had gone out, his courtiers came and looked, but behold, the doors of the roof chamber were locked. So they said, “He is only relieving himself in the cool chamber.”

25So they waited till they were embarrassed, but behold, he still did not open the doors of the roof chamber. So they took the key and opened them—and behold, their master was lying dead on the floor.