15 While it is said, Today if you will hear his voice, harden not your hearts, as in the provocation.
Hebrews 3:15 Cross References - KJC
Hebrews 3:7-8
Hebrews 10:29
29 Of how much sorer punishment, suppose you, shall he be thought worthy, who has trodden under foot the Son of God, and has counted the blood of the covenant, with which he was sanctified, an unholy thing, and has done despite unto the Spirit of grace?
Hebrews 10:38
38 Now the just shall live by faith: but if any man draw back, my soul shall have no pleasure in him.