1 Chronicles (Author Compiled by Isaiah and Ezra from records of Nathan, Gad, Iddo, Ahijah, Jehu and others.)
18:1And it cometh to pass after this, that David smiteth the Philistines, and humbleth them, and taketh Gath and its small towns out of the hand of the Philistines;
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.