Matthew Poole and continuators on Deuteronomy 31:16

16 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 amongst them, and will forsake me, and break my covenant which I have made with them.

The death of men, both good and bad, is oft called a sleep, because they shall certainly awake out of it by resurrection. See Psal. 76. 5. Dan. 12. 2. 1 Thess. 4. 13, &c. 2 Pet. 3. 4.

God certainly foresees all things to come, yea, even those which depend upon the wills of men, or contingencies of the things, as this unquestionably did.

(i. e.) Of the Canaanites, who now are possessours, but shortly 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.

Marginal references: Heb. lie down.