Judges 3:20-26
English Standard Version
Chapter 3
20And Ehud came to him as he was sitting alone in his cool roof chamber. And Ehud said, "I have a message from God for you." And he arose from his seat. 21And Ehud reached with his left hand, took the sword from his right thigh, and thrust it into his belly. 22And the hilt also went in after the blade, and the fat closed over the blade, for he did not pull the sword out of his belly; and the dung came out. 23Then Ehud went out into the porch and closed the doors of the roof chamber behind him and locked them.
24When he had gone, the servants came, and when they saw that the doors of the roof chamber were locked, they thought, "Surely he is relieving himself in the closet of the cool chamber."
25And they waited till they were embarrassed. But when he still did not open the doors of the roof chamber, they took the key and opened them, and there lay their lord dead on the floor.