'Inner chamber' in the Bible

And Bath-Sheba cometh in unto the king, to the inner chamber, and the king is very aged, and Abishag the Shunammite is serving the king:

But the rest fled to Aphek, into the city; and there a wall fell upon twenty and seven thousand of the men that were left. And Ben-hadad fled, and came into the city, into an inner chamber.

And Micaiah said, Behold, thou shalt see in that day, when thou shalt go into an inner chamber to hide thyself.