1 Kings 1:2

Wherefore his servants said unto him, Let there be sought for my lord the king a young virgin, literally, "a young woman, a virgin," and let her stand before the king, as a servant and nurse, and let her cherish him, be his constant attendant, and let her lie in thy bosom, this manner of warming chilled and enfeebled bodies by contact with young, vigorous, full-blooded bodies being advocated in ancient times, that my lord the king may get heat. This was the only object of this arrangement, which must be looked upon from the standpoint of the time, when polygamy, especially in the case of kings, was altogether in order.