Abishag in the Bible

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 Bathsheba went in unto the king into the chamber: and the king was very old; and Abishag the Shunammite ministered unto the king.

And he said, Speak, I pray thee, unto Solomon the king, (for he will not say thee nay,) that he give me Abishag the Shunammite to wife.

And she said, Let Abishag the Shunammite be given to Adonijah thy brother to wife.

And king Solomon answered and said unto his mother, And why dost thou ask Abishag the Shunammite for Adonijah? ask for him the kingdom also; for he is mine elder brother; even for him, and for Abiathar the priest, and for Joab the son of Zeruiah.