Hebrews 6:6-8

if he abandons his faith, there is no use even trying to lead him to repentance. By their sin of apostasy they re-crucify the Son of God, and have publicly repudiated him. For men’s hearts are just like the soil that drinks up the showers which often fall upon it. Some soil will yield crops as God’s blessing upon the field. But if the field continues to produce only thorns and thistles a curse hangs over it and it will be burned.