'Wall' in the Bible

And Ehud hath come unto him, and he is sitting in the upper chamber of the wall which he hath for himself, and Ehud saith, 'A word of God I have unto thee;' and he riseth from off the throne;

and he hath gone out, and his servants have come in, and look, and lo, the doors of the upper chamber are bolted, and they say, 'He is only covering his feet in the inner chamber of the wall.'