Redemption

Redemption is not an original Christian concept. The word itself means “to buy or purchase.” In the ancient world, this term was used frequently in the context of slavery. A person who wanted to purchase a slave would go to the slave market and redeem one. Often times, the term connected a slave with their freedom. That is, a slave could be redeemed once a price was paid in exchange for their freedom.  Scripture says that we were slaves to sin, but Christ redeemed us. But what was the price? It wasn’t silver. It wasn’t gold. As a matter of fact, it wasn’t any monetary amount. It was the precious blood of Jesus Christ, the sinless, spotless Lamb of God. The payment for our release was the life of the sinless Son of God. His death fulfilled God’s plan to adopt us as children, and secure our eternity in Heaven. 

In him we have redemption through his blood, the forgiveness of sins, in accordance with the riches of God’s grace that he lavished on us. With all wisdom and understanding, he made known to us the mystery of his will according to his good pleasure, which he purposed in Christ, to be put into effect when the times reach their fulfillment—to bring unity to all things in heaven and on earth under Christ.  In him we were also chosen, having been predestined according to the plan of him who works out everything in conformity with the purpose of his will, in order that we, who were the first to put our hope in Christ, might be for the praise of his glory.
Ephesians 1:7‭-‬12 NIV
https://bible.com/bible/111/eph.1.7-12.NIV

Then you will know the truth, and the truth will set you free.”
John 8:32 NIV
https://john.bible/john-8-32

For you know that it was not with perishable things such as silver or gold that you were redeemed from the empty way of life handed down to you from your ancestors, but with the precious blood of Christ, a lamb without blemish or defect.
1 Peter 1:18‭-‬19 NIV
https://bible.com/bible/111/1pe.1.18-19.NIV