Hebrews 12:14-17

14Continually pursue peace with everyone, and the sanctification without which no one will [ever] see the Lord.

15See to it that no one falls short of God’s grace; that no root of resentment springs up and causes trouble, and by it many be defiled;

16and [see to it] that no one is immoral or godless like Esau, who sold his own birthright for a single meal.

17For you know that later on, when he wanted [to regain title to] his inheritance of the blessing, he was rejected, for he found no opportunity for repentance [there was no way to repair what he had done, no chance to recall the choice he had made], even though he sought for it with [bitter] tears.