'Upper Room' in the Bible

And Ehud came unto him; and he was sitting by himself alone in the cool upper room. And Ehud said, I have a message from God unto thee. And he arose out of his seat.

Then Ehud went forth into the porch, and shut the doors of the upper room upon him, and locked them.

Now when he was gone out, his servants came; and they saw, and, behold, the doors of the upper room were locked; and they said, Surely he is covering his feet in the upper chamber.

And they tarried till they were ashamed; and, behold, he opened not the doors of the upper room: therefore they took the key, and opened them , and, behold, their lord was fallen down dead on the earth.