Romans 11:6

6 And if by grace, then it cannot be based on works; if it were, grace would no longer be grace.

Read Romans 11:6 Using Other Translations

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.
But if it is by grace, it is no longer on the basis of works; otherwise grace would no longer be grace.
And since it is through God’s kindness, then it is not by their good works. For in that case, God’s grace would not be what it really is—free and undeserved.