Because they believed not in God, and trusted not in his salvation:
Ver. 22. Because they believed not in God] As faith is a radical and complex grace; so is unbelief a radical sin, a teeming vice, Hebrews 3:12, a wellspring of wickedness; many sins are bound up in it, as Cicero saith of parricide.
And trusted not in his salvation] i.e. In his saving promises.