The righteous see it, and are glad: {n} and the innocent laugh them to scorn.

(n) The just rejoice at the destruction of the wicked for two reasons, first because God shows himself judge of the world and by this means continues his honour and glory: secondly because God shows that he had care over his in that he punished their enemies.

Jamieson-Fausset-Brown Bible Commentary

19. Triumph of the pious at the fall of the recent followers of the antediluvian sinners. While in the act of denying that God can do them any good or harm, they are cut off by Him. Eliphaz hereby justifies himself and the friends for their conduct to Job: not derision of the wretched, but joy at the vindication of God's ways (Ps 107:42; Re 15:3; 16:7; 19:1, 2).

Matthew Henry's Concise Commentary

22:15-20 Eliphaz would have Job mark the old way that wicked men have trodden, and see what the end of their way was. It is good for us to mark it, that we may not walk therein. But if others are consumed, and we are not, instead of blaming them, and lifting up ourselves, as Eliphaz does here, we ought to be thankful to God, and take it for a warning.