1 Corinthians 10:5-12   5. But with many of them God was not well pleased: for they were overthrown in the wilderness. 6. Now these things were our examples, to the intent we should not lust after evil things, as they also lusted. 7. Neither be ye idolaters, as were some of them; as it is written, The people sat down to eat and drink, and rose up to play. 8. Neither let us commit fornication, as some of them committed, and fell in one day three and twenty thousand. 9. Neither let us tempt Christ, as some of them also tempted, and were destroyed of serpents. 10. Neither murmur ye, as some of them also murmured, and were destroyed of the destroyer. 11. Now all these things happened unto them for ensamples: and they are written for our admonition, upon whom the ends of the world are come. 12. Wherefore let him that thinketh he standeth take heed lest he fall.

Hebrews 3:16-19   16. For some, when they had heard, did provoke: howbeit not all that came out of Egypt by Moses. 17. But with whom was he grieved forty years? was it not with them that had sinned, whose carcases fell in the wilderness? 18. And to whom sware he that they should not enter into his rest, but to them that believed not? 19. So we see that they could not enter in because of unbelief.