1 Samuel (Author Compiled by Isaiah from records of Samuel, David, Nathan, and Gad.)
18:21And Saul said, I will give him her, that she may be a snare to him, and that the hand of the Philistines may be upon him. And Saul said to David, Thou shalt this day be my son-in-law a second time.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.