Judges 3:23-25

23Then Ehud went out through the porch and shut the doors of the upper room behind him and locked them.

24When he had gone out, Eglon’s servants came to look, and to their surprise, the doors of the upper room were locked. So they said, “He is probably attending to his needs in the cool chamber.”

25So they waited till they were embarrassed, and still he had not opened the doors of the upper room. Therefore they took the key and opened them. And there was their master, fallen dead on the floor.