Hebrews 6:4-6

4For it is impossible, in the case of those a  who have once been enlightened, who have tasted b  the heavenly gift, and c  have shared in the Holy Spirit, 5and d  have tasted the goodness of the word of God and the powers of the age to come, 6and e  then have fallen away, to restore them again to repentance, since f  they are crucifying once again the Son of God to their own harm and holding him up to contempt.
Copyright information for ESV