Hebrews 3:18 - Ellicott's Commentary On The Whole Bible

That believed not. — Rather, that disobeyed. Every part of the solemn sentences of the Psalm is applied to the reader’s conscience, that the effect of the whole warning may be deepened: the nature of the transgression is thus brought out with the strongest emphasis. Those with whom God was angry had provoked God (Hebrews 3:16), had sinned (Hebrews 3:17), had been disobedient, had refused to believe His word (Hebrews 3:19). The action of the Israelites (Numbers 14) involved at once disobedience to God’s command that they should advance to the conquest of the land, and want of faith in the promise which made victory sure.