Romans 9:32

Why? Because it was not of faith, but as it were by the works of the Law. For they stumbled at that Stumbling-stone;

1 Peter 2:8

and a Stone-of-stumbling and a Rock-of-offense to those disobeying, who stumble at the Word, to which they also were appointed.

Matthew 13:57

And they were offended in Him. But Jesus said to them, A prophet is not without honor, except in his own country and in his own house.

Matthew 19:16-20

And behold, one came and said to Him, Good Master, what good thing shall I do that I may have eternal life?

Luke 2:34

And Simeon blessed them and said to Mary His mother, Behold, this One is set for the fall and rising again of many in Israel, and for a sign spoken against

Luke 7:23

And blessed is he who shall not be offended in Me.

John 6:27-29

Do not labor for the food that perishes, but for that food which endures to everlasting life, which the Son of Man will give you. For God the Father sealed Him.

Acts 16:30-34

And leading them outside, he said, Sirs, what must I do to be saved?

Romans 4:16

Therefore it is of faith so that it might be according to grace; for the promise to be made sure to all the seed, not only to that which is of the Law, but to that also which is of the faith of Abraham, who is the father of us all

Romans 10:3

For they, being ignorant of God's righteousness and going about to establish their own righteousness, have not submitted themselves to the righteousness of God.

Romans 11:11

I say then, Did they not stumble that they fall? Let it not be! But by their slipping away came salvation to the nations, to provoke them to jealousy.

1 Corinthians 1:23

but we preach Christ crucified, to the Jews a stumbling block, and to the Greeks foolishness.

1 John 5:9-12

If we receive the witness of men, the witness of God is greater. For this is the witness of God which He has testified 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
Therefore it is of faith so that it might be according to grace; for the promise to be made sure to all the seed, not only to that which is of the Law, but to that also which is of the faith of Abraham, who is the father of us all
Romans 10:3
For they, being ignorant of God's righteousness and going about to establish their own righteousness, have not submitted themselves to the righteousness of God.
Matthew 19:16
And behold, one came and said to Him, Good Master, what good thing shall I do that I may have eternal life?
John 6:27
Do not labor for the food that perishes, but for that food which endures to everlasting life, which the Son of Man will give you. For God the Father sealed Him.
Acts 16:30
And leading them outside, he said, Sirs, what must I do to be saved?
1 John 5:9
If we receive the witness of men, the witness of God is greater. For this is the witness of God which He has testified about His Son.

They stumbled

Romans 11:11
I say then, Did they not stumble that they fall? Let it not be! But by their slipping away came salvation to the nations, to provoke them to jealousy.
Matthew 13:57
And they were offended in Him. But Jesus said to them, A prophet is not without honor, except in his own country and in his own house.
Luke 2:34
And Simeon blessed them and said to Mary His mother, Behold, this One is set for the fall and rising again of many in Israel, and for a sign spoken against
Luke 7:23
And blessed is he who shall not be offended in Me.
1 Corinthians 1:23
but we preach Christ crucified, to the Jews a stumbling block, and to the Greeks foolishness.

General references

Matthew 19:30
But many who are first shall be last; and the last shall be first.
Mark 10:31
But many that are first shall be last; and the last shall be first.
Luke 7:23
And blessed is he who shall not be offended in Me.
Romans 4:4
But to him working, the reward is not reckoned according to grace, but according to debt.