Deuteronomy 31:20

For when I shall have brought them into the land which I sware unto their fathers, that floweth with milk and honey; and they shall have eaten and filled themselves, and waxen fat; then will they turn unto other gods, and serve them, and provoke me, and break my covenant.

EXPOSITORY (ENGLISH BIBLE)

Matthew Henry's Concise Commentary

31:14-22 Moses and Joshua attended the Divine Majesty at the door of the tabernacle. Moses is told again that he must shortly die; even those who are most ready and willing to die, need to be often reminded of its coming. The Lord tells Moses, that, after his death, the covenant he had taken so much pains to make between Israel and their God, would certainly be broken. Israel would forsake Him; then God would forsake Israel. Justly does he cast those off who so unjustly cast him off. Moses is directed to deliver them a song, which should remain a standing testimony for God, as faithful to them in giving them warning, and against them, as persons false to themselves in not taking the warning. The word of God is a discerner of the thoughts and intents of men's hearts, and meets them by reproofs and correction. Ministers who preach the word, know not the imaginations of men; but God, whose word it is, knows perfectly.

Barnes' Notes on the Bible

A witness for me against them - i. e., an attestation from their own mouths at once of God's benefits, their own duties, and their deserts when they should fall away. Being in verse it would be the more easily learned and kept in memory. The use of songs for such didactic purposes was not unknown to the legislators of antiquity. Compare also the advice of Paul, "teaching and admonishing one another in psalms and hymns and spiritual songs" Colossians 3:16.

Jamieson-Fausset-Brown Bible Commentary

19. Now therefore write ye this song—National songs take deep hold of the memories and have a powerful influence in stirring the deepest feelings of a people. In accordance with this principle in human nature, a song was ordered to be composed by Moses, doubtless under divine inspiration, which was to be learnt by the Israelites themselves and to be taught to their children in every age, embodying the substance of the preceding addresses, and of a strain well suited to inspire the popular mind with a strong sense of God's favor to their nation.

Matthew Poole's Commentary

No text from Poole on this verse.

Gill's Exposition of the Entire Bible

For when I shall have brought them into the land which I sware unto their fathers,.... To give it to them, and put them into the possession of it, even the land of Canaan, often thus described, and as it is by the following character:

that floweth with milk and honey; aboundeth with all good things; see Exodus 3:8,

and they shall have eaten and filled themselves, and waxen fat; that is, after they have for a considerable time enjoyed the good things of the land, and they abound with them, and increase in them, and have great fullness of them:

then will they turn unto other gods: turn from the Lord who has brought them into all this plenty, from the fear, worship, and service of him, and turn to the worship of idols:

and serve them: the works of men's hands, and at most but creatures, and not the Creator; than which nothing can be more absurd and stupid, as well as wicked and ungrateful:

and provoke me: nothing being more provoking to the Lord than idolatry, it striking at his very nature, being, and glory:

and break my covenant; now made with them; this being foretold by the Lord, which exactly came to pass in numerous instances, proves his precise foreknowledge of future events, even such as depend on the inclinations, dispositions, and wills of men.

Geneva Study Bible

For when I shall have brought them into the land which I sware unto their fathers, that floweth with milk and honey; and they shall have eaten and filled themselves, and waxen fat; {k} then will they turn unto other gods, and serve them, and provoke me, and break my covenant.

(k) For this is the nature of flesh, no longer to obey God, than it is under the rod.

EXEGETICAL (ORIGINAL LANGUAGES)

Cambridge Bible for Schools and Colleges

20. For I shall bring it into the land which I sware unto its fathers] Deuteronomy 6:10, but also in E. On flowing with milk and honey, see Deuteronomy 6:3.

and it shall eat and be satisfied and grow fat] Cp. Deuteronomy 6:11, Deuteronomy 8:12, Deuteronomy 32:15. Here even the deuteronomic phrases receive a peculiar form. And it will turn, as in Deuteronomy 31:18; despise me, not elsewhere in Deut., but in JE, Numbers 14:11; Numbers 14:23; Numbers 16:30, and in the Song, ch. Deuteronomy 32:19; break my covenant, as in Deuteronomy 31:17. The only plur. vbs are serve, despise.

Deuteronomy 31:20

Keil and Delitzsch Biblical Commentary on the Old Testament

"And now," sc., because what was announced in Deuteronomy 31:16-18 would take place, "write you this song." "This" refers to the song which follows in ch. 32. Moses and Joshua were to write the song, because they were both of them to strive to prevent the apostasy of the people; and Moses, as the author, was to teach it to the children of Israel, to make them learn it, that it might be a witness for the Lord (for Me) against the children of Israel. "This" is defined still further in Deuteronomy 31:20, Deuteronomy 31:21 : if Israel, through growing satisfied and fat in its land, which was so rich in costly good, should turn to other gods, and the Lord should visit it in consequence with grievous evils and troubles, the song was to answer before Israel as a witness; i.e., not only serve the Lord as a witness to the people that He had foretold all the evil consequences of apostasy, and had given Israel proper warning (Knobel), but to serve, as we may see from Deuteronomy 31:20, Deuteronomy 31:21, and from the contents of the song, as a witness, on the one hand, that the Lord had conferred upon the people so many benefits and bestowed upon them such abundant blessings of His grace, that apostasy from Him was the basest ingratitude, for which they would justly be punished; and, on the other hand, that the Lord had not rejected His people in spite of the punishments inflicted upon them, but would once more have compassion upon them and requite their foes, and thus would sanctify and glorify Himself as the only true God by His judgments upon Israel and the nations. The law, with its commandments, promises, and threats, was already a witness of this kind against Israel (cf. Deuteronomy 31:26); but just as in every other instance the appearance of a plurality of unanimous witnesses raises the matter into an indisputable truth, so the Lord would set up another witness against the Israelites besides the law, in the form of this song, which was adapted to give all the louder warning, "because the song would not be forgotten out of the mouths of their seed" (Deuteronomy 31:21). The song, when once it had passed into the mouths of the people, would not very readily vanish from their memory, but would be transmitted from generation to generation, and be heard from the mouths of their descendants, as a perpetual warning voice, as it would be used by Israel for God knew the invention of the people, i.e., the thoughts and purposes of their heart, which they cherished (עשׂה used to denote the doing of the heart, as in Isaiah 32:6) even then before He had brought them into Canaan. (On Deuteronomy 31:20, vid., Deuteronomy 7:5; Deuteronomy 9:5, and Exodus 3:8.) - In Deuteronomy 31:22 the result is anticipated, and the command of God is followed immediately by an account of its completion by Moses (just as in Exodus 12:50; Leviticus 16:34, etc.). - After this command with reference to the song, the Lord appointed Joshua to the office which he had been commanded to take, urging him at the same time to be courageous, and promising him His help in the conquest of Canaan. That the subject to ויצו is not Moses, but Jehovah, is evident partly from the words themselves, "I will be with thee' (vid., Exodus 3:12). (Note: Knobel's assertion (on Numbers 27:23) that the appointment of Joshua on the part of Moses by the imposition of hands, as described in that passage, is at variance with this verse, scarcely needs any refutation. Or is it really the case, that the installation of Joshua on the part of God is irreconcilable with his ordination by Moses?)