1 Kings (Author Compiled by Isaiah and Jeremiah from records of Nathan, Gad, Iddo, Ahijah, Jehu and others.)
6:8The entrance to the side-chambers of the middle floor was in the right side of the house; and they went up by winding stairs into the middle floor, and out of the middle into the third.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.