Hebrews 3:15
this word ever sounding in our ears, To-day, when you hear his voice, harden not your hearts as at the Provocation.
Hebrews 3:7-8
Therefore, as the holy Spirit says, To-day, when you hear his voice,
Hebrews 10:29
How much heavier, do you suppose, will be the punishment assigned to him who has spurned the Son of God, who has profaned the covenant-blood with which he was sanctified, who has insulted the Spirit of grace?
Hebrews 10:38
Meantime my just man shall live on by his faith; if he shrinks back, my soul takes no delight in him.
Treasury of Scripture Knowledge
Summary
While it is said, To day if ye will hear his voice, harden not your hearts, as in the provocation.