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In this study, Kevin Mattison examines Deuteronomy´s reworking of existing legal texts, arguing that Deuteronomy was designed to amend its main legal source, the Covenant Code (Exod 20:22-23:19). The model of amendment draws on existing models of replacement and supplementation in order to provide a more complete explanation of Deuteronomy´s rewriting of the Covenant Code, which is characterized by a combination of presupposition, complementation, and contradiction. Internal revisions within the growing text of Deuteronomy exhibit a similar combination of these three factors. Deuteronomy´s authors sought to amend the Covenant Code even as they continued to amend their own growing text. The author draws examples from laws governing sacrifice and slaughter (Deut 12:1-28), tithes and firstlings (Deut 14:22-29; 15:19-23; 26:12-15), and manslaughter and asylum (Deut 19:1-13).

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