Hebrews 6:4-8

It's impossible for those who once understood and experienced God's heavenly gift—who shared in receiving the Holy Spirit, who had known God's good word and the power of the coming age— and then completely abandon God, for them to be brought back to repentance once more. They themselves have crucified the Son of God all over again and publicly humiliated him. Land that has been watered by rain, and produces crops for those who farm it, has God's blessing. But land that only produces weeds and thorns is worthless, and is about to be condemned. In the end all that can be done is to burn it.