First Book of Kings (Author Compiled by Isaias from records of Samuel, David, Nathan, and Gad.)
20:42dixit ergo Ionathan ad David vade in pace quaecumque iuravimus ambo in nomine Domini dicentes Dominus sit inter me et te et inter semen meum et semen tuum usque in sempiternum et surrexit et abiit sed et Ionathan ingressus est civitatem
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.