Exodus 19:5
3-6. Moses went up unto God—the Shekinah—within the cloud (Ex 33:20; Joh 1:18).
Thus shalt thou say to the house of Jacob, &c.—The object for which Moses went up was to receive and convey to the people the message contained in these verses, and the purport of which was a general announcement of the terms on which God was to take the Israelites into a close and peculiar relation to Himself. In thus negotiating between God and His people, the highest post of duty which any mortal man was ever called to occupy, Moses was still but a servant. The only Mediator is Jesus Christ [1Ti 2:5; Heb 12:24]. Leviticus 20:24
24. I . . . have separated you from other people—Their selection from the rest of the nations was for the all-important end of preserving the knowledge and worship of the true God amid the universal apostasy; and as the distinction of meats was one great means of completing that separation, the law about making a difference between clean and unclean beasts is here repeated with emphatic solemnity.
Leviticus 20:26
Deuteronomy 7:3
2-6. thou shalt smite them, and utterly destroy them; thou shalt make no covenant with them—This relentless doom of extermination which God denounced against those tribes of Canaan cannot be reconciled with the attributes of the divine character, except on the assumption that their gross idolatry and enormous wickedness left no reasonable hope of their repentance and amendment. If they were to be swept away like the antediluvians or the people of Sodom and Gomorrah, as incorrigible sinners who had filled up the measure of their iniquities, it mattered not to them in what way the judgment was inflicted; and God, as the Sovereign Disposer, had a right to employ any instruments that pleased Him for executing His judgments. Some think that they were to be exterminated as unprincipled usurpers of a country which God had assigned to the posterity of Eber and which had been occupied ages before by wandering shepherds of that race, till, on the migration of Jacob's family into Egypt through the pressure of famine, the Canaanites overspread the whole land, though they had no legitimate claim to it, and endeavored to retain possession of it by force. In this view their expulsion was just and proper. The strict prohibition against contracting any alliances with such infamous idolaters was a prudential rule, founded on the experience that "evil communications corrupt good manners" [1Co 15:33], and its importance or necessity was attested by the unhappy examples of Solomon and others in the subsequent history of Israel.