Romans 11:6

But if by grace, then it is no more of works: else grace is no longer grace. And if it be of works, then it is no more grace; else work is no longer work.

Romans 3:27-28

Where is boasting then? It is excluded. By what law? Of works?

Romans 4:4-5

Now to him that worketh, the reward is not reckoned of grace, but of debt.

Romans 5:20-21

But the law came in between, that the offence might abound: yet where sin abounded, grace did much more abound:

1 Corinthians 15:10

But by the grace of God I am what I am, and his grace toward me was not in vain, but I laboured more abundantly than they all: yet not I, but the grace of God that was with me.

Galatians 2:21

I do not make void the grace of God; for if righteousness is by the law, then Christ died in vain.

Galatians 5:4

Christ is become of no effect to you, whosoever of you are justified by the law; ye are fallen from grace.

Ephesians 2:4-9

But God who is rich in mercy,

2 Timothy 1:9

not according to our works, but according to his own purpose and grace, which was given us in Christ Jesus, before the world began;

Titus 3:5

Not by works of righteousness which we had done, but according to his own mercy he saved us, by the laver of regeneration, and renewing of the Holy Ghost.

Treasury of Scripture Knowledge

Summary

And if by grace, then is it no more of works: otherwise grace is no more grace. But if it be of works, then is it no more grace: otherwise work is no more work.

General references

Bible References

And if

Romans 3:27
Where is boasting then? It is excluded. By what law? Of works?
Romans 4:4
Now to him that worketh, the reward is not reckoned of grace, but of debt.
Romans 5:20
But the law came in between, that the offence might abound: yet where sin abounded, grace did much more abound:
1 Corinthians 15:10
But by the grace of God I am what I am, and his grace toward me was not in vain, but I laboured more abundantly than they all: yet not I, but the grace of God that was with me.
Galatians 2:21
I do not make void the grace of God; for if righteousness is by the law, then Christ died in vain.
Galatians 5:4
Christ is become of no effect to you, whosoever of you are justified by the law; ye are fallen from grace.
Ephesians 2:4
But God who is rich in mercy,
2 Timothy 1:9
not according to our works, but according to his own purpose and grace, which was given us in Christ Jesus, before the world began;
Titus 3:5
Not by works of righteousness which we had done, but according to his own mercy he saved us, by the laver of regeneration, and renewing of the Holy Ghost.

General references

Acts 28:24
And some believed the things that were spoken, and some believed not.
Romans 4:4
Now to him that worketh, the reward is not reckoned of grace, but of debt.
Ephesians 2:9
it is the gift of God: Not of works, lest any man should boast.