Hebrews 3:12-13 Beware, brethren, lest there be in any of you an evil heart of unbelief in departing from the living God; but exhort one another daily, while it is called "Today," lest any of you be hardened through the deceitfulness of sin.
Hebrews 2:1 Therefore we must give the more earnest heed to the things we have heard, lest we drift away.
Hebrews 2:3 how shall we escape if we neglect so great a salvation, which at the first began to be spoken by the Lord, and was confirmed to us by those who heard Him,
Hebrews 10:25-31 not forsaking the assembling of ourselves together, as is the manner of some, but exhorting one another, and so much the more as you see the Day approaching. For if we sin willfully after we have received the knowledge of the truth, there no longer remains a sacrifice for sins, but a certain fearful expectation of judgment, and fiery indignation which will devour the adversaries. Anyone who has rejected Moses' law dies without mercy on the testimony of two or three witnesses. Of how much worse punishment, do you suppose, will he be thought worthy who has trampled the Son of God underfoot, counted the blood of the covenant by which he was sanctified a common thing, and insulted the Spirit of grace? For we know Him who said, "Vengeance is Mine, I will repay," says the Lord. And again, "The LORD will judge His people." It is a fearful thing to fall into the hands of the living God.
Deuteronomy 17:14-20 'When you come to the land which the LORD your God is giving you, and possess it and dwell in it, and say, 'I will set a king over me like all the nations that are around me,' you shall surely set a king over you whom the LORD your God chooses; one from among your brethren you shall set as king over you; you may not set a foreigner over you, who is not your brother. But he shall not multiply horses for himself, nor cause the people to return to Egypt to multiply horses, for the LORD has said to you, ‘You shall not return that way again.’ Neither shall he multiply wives for himself, lest his heart turn away; nor shall he greatly multiply silver and gold for himself. “Also it shall be, when he sits on the throne of his kingdom, that he shall write for himself a copy of this law in a book, from the one before the priests, the Levites. And it shall be with him, and he shall read it all the days of his life, that he may learn to fear the LORD his God and be careful to observe all the words of this law and these statutes, that his heart may not be lifted above his brethren, that he may not turn aside from the commandment to the right hand or to the left, and that he may prolong his days in his kingdom, he and his children in the midst of Israel.
John 6:66 From that time many of His disciples went back and walked with Him no more.
Romans 8:7 Because the carnal mind is enmity against God; for it is not subject to the law of God, nor indeed can be.
1 Timothy 4:1 Now the Spirit expressly says that in latter times some will depart from the faith, giving heed to deceiving spirits and doctrines of demons,
2 Timothy 2:12 If we endure, We shall also reign with Him. If we deny Him, He also will deny us.
Hebrews 3:18 And to whom did He swear that they would not enter His rest, but to those who did not obey?
Hebrews 4:1-2 Therefore, since a promise remains of entering His rest, let us fear lest any of you seem to have come short of it. For indeed the gospel was preached to us as well as to them; but the word which they heard did not profit them, not being mixed with faith in those who heard it.
Hebrews 10:39 But we are not of those who draw back to perdition, but of those who believe to the saving of the soul.
2 Peter 2:1 But there were also false prophets among the people, even as there will be false teachers among you, who will secretly bring in destructive heresies, even denying the Lord who bought them, and bring on themselves swift destruction.
1 John 2:15 Do not love the world or the things in the world. If anyone loves the world, the love of the Father is not in him.
Deuteronomy 7:3-4 Nor shall you make marriages with them. You shall not give your daughter to their son, nor take their daughter for your son. For they will turn your sons away from following Me, to serve other gods; so the anger of the LORD will be aroused against you and destroy you suddenly.
1 Kings 11:3-4 And he had seven hundred wives, princesses, and three hundred concubines; and his wives turned away his heart. For it was so, when Solomon was old, that his wives turned his heart after other gods; and his heart was not loyal to the LORD his God, as was the heart of his father David.
Ecclesiastes 8:11 Because the sentence against an evil work is not executed speedily, therefore the heart of the sons of men is fully set in them to do evil.