Hebrews 3
12 Ref My brothers, take care that there is not by chance in any one of you an evil heart without belief, turning away from the living God:
13 Ref But give comfort to one another every day as long as it is still Today; so that no one among you may be made hard by the deceit of sin:
14 Ref For if we keep the substance of the faith which we had at the start, even till the end, we have a part with Christ;
15 Ref As it is said, Today if you will let his voice come to your ears, be not hard of heart, as when you made him angry.
16 Ref Who made him angry when his voice came to them? was it not all those who came out of Egypt with Moses?
17 Ref And with whom was he angry for forty years? was it not with those who did evil, who came to their deaths in the waste land?
18 Ref And to whom did he make an oath that they might not come into his rest? was it not to those who went against his orders?
19 Ref So we see that they were not able to go in because they had no belief.