Hebrews 6:4-8

6:4 For it is impossible in the case of those who have once been enlightened, tasted the heavenly gift, become partakers of the Holy Spirit, 6:5 tasted the good word of God and the miracles of the coming age, 6:6 and then have committed apostasy, to renew them again to repentance, since they are crucifying the Son of God for themselves all over again and holding him up to contempt. 6:7 For the ground that has soaked up the rain that frequently falls on it and yields useful vegetation for those who tend it receives a blessing from God. 6:8 But if it produces thorns and thistles, it is useless and about to be cursed; its fate is to be burned.

Hebrews 6:11

6:11 But we passionately want each of you to demonstrate the same eagerness for the fulfillment of your hope until the end,