Is because they

1. Gen. 43: 18
     18 And the men were afraid, because they were brought into Joseph’s house; and they said, Because of the money that was returned in our sacks at the first time are we brought in; that he may seek occasion against us, and fall upon us, and take us for bondmen, and our asses.
2. Josh. 5: 6-7
     6 For the children of Israel walked forty years in the wilderness, till all the people that were men of war, which came out of Egypt, were consumed, because they obeyed not the voice of the Lord: unto whom the Lord sware that he would not shew them the land, which the Lord sware unto their fathers that he would give us, a land that floweth with milk and honey.
     7 And their children, whom he raised up in their stead, them Joshua circumcised: for they were uncircumcised, because they had not circumcised them by the way.
3. Job 6: 20
     20 They were confounded because they had hoped; they came thither, and were ashamed.
4. Ps. 119: 158
     158 I beheld the transgressors, and was grieved; because they kept not thy word.
5. Joel 1: 18
     18 How do the beasts groan! the herds of cattle are perplexed, because they have no pasture; yea, the flocks of sheep are made desolate.
6. Matt. 11: 20
     20 ¶ Then began he to upbraid the cities wherein most of his mighty works were done, because they repented not:
7. Alma 33: 20
     20 But few understood the meaning of those things, and this because of the hardness of their hearts. But there were many who were so hardened that they would not look, therefore they perished. Now the reason they would not look is because they did not believe that it would heal them.
8. Alma 60: 13
     13 For the Lord suffereth the righteous to be slain that his justice and judgment may come upon the wicked; therefore ye need not suppose that the righteous are lost because they are slain; but behold, they do enter into the rest of the Lord their God.
9. 3 Ne. 10: 15
     15 Behold, I say unto you, Yea, many have testified of these things at the coming of Christ, and were slain because they testified of these things.
10. Morm. 9: 20
      20 And the reason why he ceaseth to do miracles among the children of men is because that they dwindle in unbelief, and depart from the right way, and know not the God in whom they should trust.