Treasury of Scripture Knowledge
I will therefore put you in remembrance, though ye once knew this, how that the Lord, having saved the people out of the land of Egypt, afterward destroyed them that believed not.
1 Corinthians 10:1
For it is my desire, my brothers, that you may keep in mind how all our fathers were under the cloud, and they all went through the sea;
Because all these men, having seen my glory and the signs which I have done in Egypt and in the waste land, still have put me to the test ten times, and have not given ear to my voice;
But among all these was not one of those numbered by Moses and Aaron the priest when the children of Israel were numbered in the waste land of Sinai.
For the hand of the Lord was against them, working their destruction, till all were dead.
So he made an oath against them, to put an end to them in the waste land:
Who made him angry when his voice came to them? was it not all those who came out of Egypt with Moses?
Let us then, though we still have God's word that we may come into his rest, go in fear that some of you may be unable to do so.
But for all this, you had no faith in the Lord your God,
Did not Achan, the son of Zerah, do wrong about the cursed thing, causing wrath to come on all the people of Israel? And not on him only came the punishment of death.
Because they had no faith in God, and no hope in his salvation.
And five of them were foolish, and five were wise.
1 Corinthians 10:5
But with most of them God was not pleased: for they came to their end in the waste land.
1 Timothy 5:15
For even now some are turned away to Satan.
So we see that they were not able to go in because they had no belief.