First Book of Kings (Author Compiled by Isaias from records of Samuel, David, Nathan, and Gad.)
20:8fac ergo misericordiam in servum tuum quia foedus Domini me famulum tuum tecum inire fecisti si autem est in me aliqua iniquitas tu me interfice et ad patrem tuum ne introducas me
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.