1 Kings 1:1-4

Now king David was old and stricken in years; and they covered him with clothes, but he gat no heat.

Wherefore his servants said unto him, Let there be sought for my lord the king a young virgin: and let her stand before the king, and let her cherish him, and let her lie in thy bosom, that my lord the king may get heat.

So they sought for a fair damsel throughout all the coasts of Israel, and found Abishag a Shunammite, and brought her to the king.

And the damsel was very fair, and cherished the king, and ministered to him: but the king knew her not.