Hebrews 6

4 It is impossible for those who have once been enlightened, who have tasted the heavenly gift, who have shared in the Holy Spirit, 5 who have tasted the goodness of the word of God and the powers of the coming age 6 and who have fallen*6:6 Or age, 6 if they fall away, to be brought back to repentance. To their loss they are crucifying the Son of God all over again and subjecting him to public disgrace.