1 Corinthians 15:2

15:2 and by which you are being saved, if you hold firmly to the message I preached to you – unless you believed in vain.

Ephesians 2:8-10

2:8 For by grace you are saved through faith, and this is not from yourselves, it is the gift of God; 2:9 it is not from works, so that no one can boast. 2:10 For we are his workmanship, having been created in Christ Jesus for good works that God prepared beforehand so we may do them.