1 Samuel (Author Compiled by Isaiah from records of Samuel, David, Nathan, and Gad.)
Chapter 18
22And Saul commanded his servants, saying, Commune with David secretly, and say, Behold, the king hath delight in thee, and all his servants love thee: now therefore be the king's son in law.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.