Hebrews 3:8-12

Do not harden your hearts as when they provoked Me, As on the day of trial in the wilderness,

Where your fathers put Me to the test, And saw My works for forty years.

“Therefore I was angry with this generation, And said, ‘They always go astray in their heart, And they did not know My ways’;

As I swore in My anger, ‘They certainly shall not enter My rest.’ ” The Danger of Unbelief

Take care, brothers and sisters, that there will not be in any one of you an evil, unbelieving heart that falls away from the living God.