"because all these men who have seen My glory and the signs which I did in Egypt and in the wilderness, and have put Me to the test now these ten times, and have not heeded My voice,

But among these there was not a man of those who were numbered by Moses and Aaron the priest when they numbered the children of Israel in the Wilderness of Sinai.

For the LORD had said of them, "They shall surely die in the wilderness." So there was not left a man of them, except Caleb the son of Jephunneh and Joshua the son of Nun.

" So it was, when all the men of war had finally perished from among the people,

But with most of them God was not well pleased, for [their bodies] were scattered in the wilderness.

Now with whom was He angry forty years? [Was it] not with those who sinned, whose corpses fell in the wilderness?

So we see that they could not enter in because of unbelief.