First Book of Kings (Author Compiled by Isaias from records of Samuel, David, Nathan, and Gad.)
26:6ait David ad Ahimelech Cettheum et Abisai filium Sarviae fratrem Ioab dicens quis descendet mecum ad Saul in castra dixitque Abisai ego descendam tecum
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.