First Book of Kings (Author Compiled by Isaias from records of Samuel, David, Nathan, and Gad.)
28:1factum est autem in diebus illis congregaverunt Philisthim agmina sua ut praepararentur ad bellum contra Israhel dixitque Achis ad David sciens nunc scito quoniam mecum egredieris in castris tu et viri tui
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.