Hebrews 6

4 For it is impossible concerning those who have once been enlightened, and have tasted the heavenly gift, and become sharers of the Holy Spirit, 5 and have tasted the good word of God and the powers of the coming age, 6 and having fallen away, to renew them again to repentance, because they**Here "because" is supplied as a component of the participle ("have crucified again") which is understood as causal have crucified again for themselves the Son of God and held him up to contempt.