Romans 9:32

And why? Because they looked to obedience, and not to faith, to secure it. They stumbled over 'the Stumbling-block.'

1 Peter 2:8

and 'a stumbling-block, and a rock which shall prove a hindrance.' They stumble because they do not accept the Message. This was the fate destined for them.

Matthew 13:57

These things proved a hindrance to their believing in him; whereupon Jesus said: "A prophet is not without honor, except in his own country and in his own house."

Matthew 19:16-20

And a man came up to Jesus, and said: "Teacher, what good thing must I do to obtain Immortal life?"

Luke 2:34

Simeon gave them his blessing, and said to Mary, the child's mother: "This child is appointed to be the cause of the fall and rise of many in Israel, and to be a sign much spoken against--

Luke 7:23

And blessed is the man who finds no hindrance in me."

John 6:27-29

Work, not for the food that perishes, but for the food that lasts for Immortal Life, which the Son of Man will give you; for upon him the Father--God himself--has set the seal of his approval."

Acts 16:30-34

Then he led them out, and said: "What must I do to be saved?"

Romans 4:16

That is why all is made to depend upon faith, that all may be God's gift, and in order that the fulfillment of the promise may be made certain for all Abraham's descendants-not only for those who take their stand on the Law, but also for those who take their stand on the faith of Abraham. (He is the Father of us all;

Romans 10:3

For, in their ignorance of the Divine Righteousness, and in their eagerness to set up a righteousness of their own, they refused to accept with submission the Divine Righteousness.

Romans 11:11

I ask then--'Was their stumbling to result in their fall?' Heaven forbid! On the contrary, through their falling away Salvation has reached the Gentiles, to stir the rivalry of Israel.

1 Corinthians 1:23

We are proclaiming Christ crucified!-to the Jews an obstacle, to the Gentiles mere folly,

1 John 5:9-12

We accept the testimony of men, but God's testimony is still stronger; and there is the testimony of God--the fact that he has already borne testimony about his Son.

Treasury of Scripture Knowledge

Summary

Wherefore? Because they sought it not by faith, but as it were by the works of the law. For they stumbled at that stumblingstone;

Bible References

Because

Romans 4:16
That is why all is made to depend upon faith, that all may be God's gift, and in order that the fulfillment of the promise may be made certain for all Abraham's descendants-not only for those who take their stand on the Law, but also for those who take their stand on the faith of Abraham. (He is the Father of us all;
Romans 10:3
For, in their ignorance of the Divine Righteousness, and in their eagerness to set up a righteousness of their own, they refused to accept with submission the Divine Righteousness.
Matthew 19:16
And a man came up to Jesus, and said: "Teacher, what good thing must I do to obtain Immortal life?"
John 6:27
Work, not for the food that perishes, but for the food that lasts for Immortal Life, which the Son of Man will give you; for upon him the Father--God himself--has set the seal of his approval."
Acts 16:30
Then he led them out, and said: "What must I do to be saved?"
1 John 5:9
We accept the testimony of men, but God's testimony is still stronger; and there is the testimony of God--the fact that he has already borne testimony about his Son.

They stumbled

Romans 11:11
I ask then--'Was their stumbling to result in their fall?' Heaven forbid! On the contrary, through their falling away Salvation has reached the Gentiles, to stir the rivalry of Israel.
Matthew 13:57
These things proved a hindrance to their believing in him; whereupon Jesus said: "A prophet is not without honor, except in his own country and in his own house."
Luke 2:34
Simeon gave them his blessing, and said to Mary, the child's mother: "This child is appointed to be the cause of the fall and rise of many in Israel, and to be a sign much spoken against--
Luke 7:23
And blessed is the man who finds no hindrance in me."
1 Corinthians 1:23
We are proclaiming Christ crucified!-to the Jews an obstacle, to the Gentiles mere folly,

General references

Matthew 19:30
But many who are first now will then be last, and those who are last will be first.
Mark 10:31
But many who are first now will then be last, and the last will be first."
Luke 7:23
And blessed is the man who finds no hindrance in me."
Romans 4:4
Now wages are regarded as due to the man who works, not as a favor, but as a debt;