Harden

Hebrews 3:14-15

14 For we have become partakers of Christ if we hold the beginning of our confidence steadfast to the end, 15 while it is said: "Today, if you will hear His voice, Do not harden your hearts as in the rebellion."

Hebrews 3:7-12

7 Therefore, as the Holy Spirit says: "Today, if you will hear His voice, 8 Do not harden your hearts as in the rebellion, In the day of trial in the wilderness, 9 Where your fathers tested Me, tried Me, And saw My works forty years. 10 Therefore I was angry with that generation, And said, 'They always go astray in their heart, And they have not known My ways.' 11 So I swore in My wrath, 'They shall not enter My rest.' " 12 Beware, brethren, lest there be in any of you an evil heart of unbelief in departing from the living God;