Two striking developments in late antiquity are the growing influence of Christianity and the codification of Roman law. The first attempt to harmonize these two developments lies in the late antique Latin work known by scholars as the Lex Dei (“Law of God”) or Collatio Legum Mosaicarum et Romanarum (“Collation of the Laws of Moses and of the Romans”). The anonymous collator of this short legal compendium organized his work following a fairly regular plan, dividing it into sixteen topics (traditionally called titles). Each title begins with a quotation from the Hebrew Bible (in Latin), followed by quotations of passages from Roman jurists and, occasionally, from Roman law. His apparent motive was to demonstrate the similarity between Roman law and the law of God. Scholars have differed over where the collator obtained his Latin translations of passages from the Hebrew Bible. Did he make his own translation from the Greek Septuagint or directly from the Hebrew Scriptures themselves? Did he use the famous Latin translation of Jerome or an older, pre-Jerome, Latin translation of the Bible, known by scholars as the Vetus Latina or Old Latin Bible? Re-examination of the evolution of texts of the Latin Bible and close comparison of biblical passages from the Lex Dei with other surviving Latin versions will confirm that the collator used one of the several versions of the Old Latin Bible that were in circulation in late antiquity. Such a conclusion supports the argument that the religious identity of the collator was Christian (a subject of scholarly controversy for almost a century). Moreover, analysis of the collator's use of the Bible can also shed light on his methodology in compiling his collection.