John Calvin on Deuteronomy 5:4-8

4. Face to face. Again he commends the Law by mentioning their certainty about it; for, when God openly manifested Himself, there could be no doubt of the author from whom it proceeded. To speak “face to face,” is equivalent to discoursing openly and familiarly; and in point of fact God had spoken with them, as mortals and friends communicate with each other in their mutual dealings. Moreover, lest any doubt should still remain, God set before their eyes a visible manifestation of His glory, by appearing in the fire; for no other voice but that of God Himself could proceed out of fire. In the next verse a kind of explanation is added, when he says that he was the interpreter, who laid before them the commands he received from God. And thus he reconciles two things which seem at first sight to be contradictory, viz., that God spoke in person, and yet by a mediator; since they themselves having heard God’s voice petitioned in their fear that He should not continue to speak in the same way. Hence it follows that they were convinced, by a sense of the divine glory and majesty, that it was not allowable for them to doubt the authority of the law. But I only slightly glance at this, because it has been more fully treated of before.

Deuteronomy 4:20. But the Lord hath taken you. He argues that, from the period of their deliverance, they have been wholly devoted to God, since He has purchased them for His own peculiar possession. Hence it follows that they are under His jurisdiction and dominion; because it would be foul and wicked ingratitude in them to shake off the yoke of their redeemer. And, in order to strengthen the obligation, he extols the greatness of the favor, because nothing could be more wretched than they were, when God stretched forth His hand to deliver them. Their bondage is therefore called metaphorically, a “furnace,” nay, an “iron” one; and, then, their present far different condition is compared with it; for this was solid and most desirable happiness, that they should be translated into God’s peculiar inheritance.

LEVITICUS 19

Leviticus 19:36, 37

36. I am the Lord your God, which brought you out of the land of Egypt.

36. Ego Jehova Deus vester, qui eduxi vos e terra Aegypti.

37. Therefore shall ye observe all my statutes, and all my judgments, and do them: I am the Lord.

37. Custodite igitur omnia statuta mea, et omnia judicia mea, et facite illa: ego Jehova.

leviticus 20

Leviticus 20:8

8. And ye shall keep my statutes, and do them: I am the Lord which sanctify you.

8. Custodite statuta men, et facite ea, Ego Jehova sanctificans vos.