He is a lush plant before the sun, and his shoots spread over his garden.
Bildad here discourses very well on the sad catastrophe of hypocrites and evil-doers and the fatal period of all their hopes and joys. He will not be so bold as to say with Eliphaz that none that were righteous were ever cut off thus (Job 4:7); yet he takes it for granted that God, in the course of his providence, does ordinarily bring wicked men...
Commenting on Job 8:8-19
His roots are wrapped about the heap,.... The heap of stones where the tree stands; it strikes its roots among them, and implicates and twists them about them, and secures itself and grows up notwithstanding them: and this expresses the seeming stable state and condition of hypocrites for a season, who not only flourish, but seem to take root; and who maintain their ground amidst...
before the sun--that is, he (the godless) is green only before the sun rises; but he cannot bear its heat, and withers. So succulent plants like the gourd (Jon 4:7-8). But the widespreading in the garden does not quite accord with this. Better, "in sunshine"; the sun representing the smiling fortune of the hypocrite, during which he wondrously progresses [UMBREIT].