Romans 3:20, 27, 28
Therefore no one will be justified in His sight by works of the Law. For the Law merely brings awareness of sin. . . .

Romans 4:2
If Abraham was indeed justified by works, he had something to boast about, but not before God.

Romans 9:11, 16
Yet before the twins were born or had done anything good or bad, in order that God's plan of election might stand, . . .

Romans 11:6
And if it is by grace, then it is no longer by works. Otherwise, grace would no longer be grace.

1 Corinthians 1:29-31
so that no one may boast in His presence. . . .

2 Timothy 1:9
He has saved us and called us with a holy calling, not because of our own works, but by His own purpose and by the grace He granted us in Christ Jesus before time eternal.

Titus 3:3-5
For at one time we too were foolish, disobedient, misled, enslaved to all sorts of desires and pleasures, living in malice and envy, hateful, and hating one another. . . .