Deuteronomy 4:13

And he declared unto you His covenant which He commanded you to perform, even ten commandments, Exodus 20:1; Exodus 34:28; and He wrote them upon two tables of stone. The covenant consisted essentially in this, that the doing on the part of the people corresponded to the command on the part of the Lord. As the memory of God's goodness and of the covenant was to induce Israel to be faithful to Him, so we Christians should ever keep His kindness and His mercy before our eyes as a spur to a life of sanctification.