The case against the false doctrine of OSAS
4 For it is impossible, in the case of those who have once been enlightened, who have tasted the heavenly gift, and have shared in the Holy Spirit,
5 and have tasted the goodness of the word of God and the powers of the age to come,
6 and then have fallen away, to restore them again to repentance, since they are crucifying once again the Son of God to their
own harm and holding him up to contempt.
Hebrews 6:
26 For if we go on sinning deliberately after receiving the knowledge of the truth, there no longer remains a sacrifice for sins,
27 but a fearful expectation of judgment, and a fury of fire that will consume the adversaries.
28 Anyone who has set aside the law of Moses dies without mercy on the evidence of two or three witnesses.
29 How much worse punishment, do you think, will be deserved by the one who has trampled underfoot the Son of God, and has profaned the blood of the covenant by which he was sanctified, and has outraged the Spirit of grace?
38 but my righteous ones shall live by faith, and if he shrinks back, my soul has no pleasure in him.”
39 But we are not of those who shrink back and are destroyed, but of those who have faith and preserve their souls.
Hebrews 10: