Matthew 5:17-20

“Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil. For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled. Whosoever therefore shall break one of these least Commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven.”

Hebrews 10:26-29

“For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins, … He that despised Moses' law died without mercy under two or three witnesses: Of how much sorer punishment, suppose you, shall he be thought worthy, who has trodden under foot the Son of God, and has counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and has done despite unto the Spirit of grace?”