After Ehud was gone, Eglon’s servants came in and found the doors of the upper room locked. “He must be relieving himself in the cool room,” they said.
Jewish Publication Society of America Version (JPS1917) - Judges 3:24 >Now when he was gone out, his servants came; and they saw, and, behold, the doors of the upper chamber were locked; and they said: 'Surely he is covering his feet in the cabinet of the cool chamber.'