First Book of Kings (Author Compiled by Isaias from records of Samuel, David, Nathan, and Gad.)
18:5egrediebatur quoque David ad omnia quaecumque misisset eum Saul et prudenter se agebat posuitque eum Saul super viros belli et acceptus erat in oculis universi populi maximeque in conspectu famulorum Saul
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.