I recently read a study on the "Didascalia Apostulorum",probably composed in Syria in the first half of the third century AD.
I was very impressed by the theory contained therein, according to which it is necessary to discern, within the commandments of the Pentateuch, between a "First Law", also simply called "Law", and a "Second Law". The precepts of the "First Law" are represented by the Decalogue and more generally by the rules of the Torah that the Creator issued before the Israelites committed idolatry by worshiping the golden calf. The commandments of the "First Law" are eternal and constitute a "sweet yoke" for the human being; after the adoration of the golden calf, the Creator instead issued a "Second Law", made up of a "heavy burden" of rules which take on a substantially punitive and afflictive guise. In this context, Jesus Christ would come to repeal the "Second Law" and thus free the faithful from this burden.
Do you know the historical-theological origin of this theory?