.... the older theologians did not always clearly distinguish between the covenant of works and the Sinaitic covenant. At Sinai it was not the "bare" law that was given, but a reflection of the covenant of works revived, as it were, in the interests of the covenant of grace continued at Sinai. ... Geerhardus Vos, The Doctrine of the Covenant in Reformed Theology (Kindle Locations 412-414). Monergism Books. Kindle Edition.