The future apostasy of the people is announced in the presence of Joshua that the latter might be fully aware of the danger and strive in his day to avert it. This he faithfully did (compare Joshua 24:31); but we find him in his own last address to Israel repeating Joshua 23:15-16 the self-same prediction and warning.

Behold, thou shalt sleep with thy fathers - שכב shocheb, thou shalt lie down; it signifies to rest, take rest in sleep, and, metaphorically, to die. Much stress cannot be safely laid on this expression to prove the immortality of the soul, or that the people in the time of Moses had a distinct notion of its separate existence. It was, however, understood in this sense by Jonathan ben Uzziel, who in his Targum paraphrases the word thus: "Thou shalt lie down in the dust with thy fathers; and thy soul (נשמתך nishmethach) shall be laid up in the treasury of the life to come with thy fathers."

And the Lord said unto Moses,.... Out of the pillar of cloud:

behold, thou shalt sleep with thy fathers; a phrase expressive of death, frequently used both of good and bad men, which serves to render death easy and familiar, and less formidable; and to assure and lead into an expectation of an awaking out of it, or a resurrection from it:

and this people will rise up; in their posterity; for not till after Joshua's death, and the death of the elders of Israel, did they revolt to idolatry, Joshua 24:31,

and go a whoring after the gods of the strangers of the land, whither they go to be amongst them; that is, after the gods of the Canaanites, who though at this time the inhabitants of the land, yet when the children of Israel became possessors of it, they were the strangers of it; and being suffered to continue contrary to the directions God had given to destroy them, would be a means of drawing them into the worship of their idols, expressed here by going a whoring after them, or committing whoredom with them. Idolatry in Scripture is frequently signified by fornication and adultery; and, as foretold, this was the case; see Psalm 106:35,

and will forsake me: their husband, departing from his worship and service:

and break my covenant which I have made with them at Sinai; and now again in the plains of Moab, and which had the nature of a matrimonial contract; see Jeremiah 31:32.

And the LORD said unto Moses, Behold, thou shalt sleep with thy fathers; and this people will rise up, and go a whoring after the gods of the strangers of the land, whither they go to be among them, and will forsake me, and break my covenant which I have made with them.

31:16 The strangers of the land - That is, of the Canaanites, who will be turned out of their possessions, and become as strangers in their own land. This aggravates their folly to worship such gods as could neither preserve their friends, nor annoy their enemies.

sleep: Heb. lie down

16-22. the Lord said unto Moses, . this people will rise up-In this remarkable interview, Moses was distinctly apprised of the infidelity of Israel, their corruptions of the true religion through intercourse with the idolatrous inhabitants of Canaan (Am 5:26), and their chastisements in consequence of those national defections.

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.