First Book of Kings (Author Compiled by Isaias from records of Samuel, David, Nathan, and Gad.)
24:2adsumens ergo Saul tria milia electorum virorum ex omni Israhel perrexit ad investigandum David et viros eius etiam super abruptissimas petras quae solis hibicibus perviae sunt
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.