Found by Luna

“It is not possible to distinguish between the Old and New Testaments as one giving law and the other grace, because the very premise of the giving of the law to Israel was the grace of God, because God was gracious unto them, therefore, he was giving them his law, and this is definitely stated, both in Exodus and Deuteronomy before the giving of the Ten Commandments, that this is an act of grace. The law and grace are inseparable.”

— R. J. Rushdoony