First Book of Kings (Author Compiled by Isaias from records of Samuel, David, Nathan, and Gad.)
26:15et ait David ad Abner numquid non vir tu es et quis alius similis tui in Israhel quare ergo non custodisti dominum tuum regem ingressus est enim unus de turba ut interficeret regem dominum tuum
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.