22 For a fire will be kindled by my wrath, one that burns down to the realm of the dead below. It will devour the earth and its harvests and set afire the foundations of the mountains.

Matthew Henry's Commentary on Deuteronomy 32:22

Commentary on Deuteronomy 32:19-25

(Read Deuteronomy 32:19-25)

The revolt of Israel was described in the foregoing verses, and here follow the resolves of Divine justice as to them. We deceive ourselves, if we think that God will be mocked by a faithless people. Sin makes us hateful in the sight of the holy God. See what mischief sin does, and reckon those to be fools that mock at it.