Isaiah 52:3

52:3 For this is what the Lord says:

“You were sold for nothing,

and you will not be redeemed for money.”

Romans 3:24

3:24 But they are justified freely by his grace through the redemption that is in Christ Jesus.

Ephesians 2:4-8

2:4 But God, being rich in mercy, because of his great love with which he loved us, 2:5 even though we were dead in transgressions, made us alive together with Christ – by grace you are saved! – 2:6 and he raised us up with him and seated us with him in the heavenly realms in Christ Jesus, 2:7 to demonstrate in the coming ages the surpassing wealth of his grace in kindness toward us in Christ Jesus. 2:8 For by grace you are saved through faith, and this is not from yourselves, it is the gift of God;