Romans 9:32

because they sought it not by faith, but 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 offence. These stumble at the word through unbelief, unto which also they were appointed.

Matthew 13:57

So they were prejudiced against Him. But Jesus said unto them, A prophet is no where less honoured than in his own country, and in his own family.

Matthew 19:16-20

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

Luke 2:34

And Simeon blessed them, and said to Mary his mother, Behold, this child is appointed for the fall and rising again of many in Israel, and for a sign which shall be spoken against,

Luke 7:23

and happy is he who shall not be offended at any thing in me.

John 6:27-29

Labour not so much for the meat that perisheth, but rather for that food which endureth unto life eternal, which the Son of man will give you: for Him hath God the Father sealed.

Acts 16:30-34

and bringing them out, he said, Sirs, what must I do to be saved?

Romans 4:16

And therefore it is of faith, that it might be by grace, that so the promise might be sure to all the seed; not to that only which is of the law, but also to that which is of the faith of Abraham, who is the father of us all,

Romans 10:3

For being ignorant of the righteousness of God, and seeking to establish their own righteousness, they have not submitted themselves to the righteousness which is of God.

Romans 11:11

Say I then, Have they stumbled, that they should fall irrecoverably? God forbid! but this I say, that by their fall salvation is come to the Gentiles to excite them to emulation.

1 Corinthians 1:23

to the Jews indeed a stumbling-block, and to the Greeks foolishness; but to them that are called,

1 John 5:9-12

Now if we admit the testimony of men, sure the testimony of God is greater: and this is the testimony of God, which He hath testified concerning 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
And therefore it is of faith, that it might be by grace, that so the promise might be sure to all the seed; not to that only which is of the law, but also to that which is of the faith of Abraham, who is the father of us all,
Romans 10:3
For being ignorant of the righteousness of God, and seeking to establish their own righteousness, they have not submitted themselves to the righteousness which is of God.
Matthew 19:16
And behold, there came one to Him, and said, Good master, what good shall I do, that I may have eternal life?
John 6:27
Labour not so much for the meat that perisheth, but rather for that food which endureth unto life eternal, which the Son of man will give you: for Him hath God the Father sealed.
Acts 16:30
and bringing them out, he said, Sirs, what must I do to be saved?
1 John 5:9
Now if we admit the testimony of men, sure the testimony of God is greater: and this is the testimony of God, which He hath testified concerning his Son.

They stumbled

Romans 11:11
Say I then, Have they stumbled, that they should fall irrecoverably? God forbid! but this I say, that by their fall salvation is come to the Gentiles to excite them to emulation.
Matthew 13:57
So they were prejudiced against Him. But Jesus said unto them, A prophet is no where less honoured than in his own country, and in his own family.
Luke 2:34
And Simeon blessed them, and said to Mary his mother, Behold, this child is appointed for the fall and rising again of many in Israel, and for a sign which shall be spoken against,
Luke 7:23
and happy is he who shall not be offended at any thing in me.
1 Corinthians 1:23
to the Jews indeed a stumbling-block, and to the Greeks foolishness; but to them that are called,

General references

Matthew 19:30
But many that are first shall be last, and the last first.
Mark 10:31
But many that are first shall be last, and the last first.
Luke 7:23
and happy is he who shall not be offended at any thing in me.
Romans 4:4
Now to him that worketh the reward is not reckoned as a favor, but as a debt: