First Book of Kings (Author Compiled by Isaias from records of Samuel, David, Nathan, and Gad.)
17:55eo autem tempore quo viderat Saul David egredientem contra Philistheum ait ad Abner principem militiae de qua stirpe descendit hic adulescens Abner dixitque Abner vivit anima tua rex si novi
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.