18 The wicked are ransom for the righteous, and the unfaithful for the upright.
Proverbs 21:18 Cross References - ISV
Proverbs 11:8
8 The righteous person is delivered from trouble; it comes upon the wicked instead.
Isaiah 43:3-4
3 “I am the LORD your God, the Holy One of Israel, your Redeemer. And I’ve given Egypt as your ransom, Cush and the people of Seba in exchange for you.
4 Since you’re precious in my sight and honored, and because I love you, I’m giving up people in your place, and nations in exchange for your life.”
Isaiah 53:4-5
4 “Surely he has borne our sufferings and carried our sorrows; yet we considered him stricken, and struck down by God, and afflicted.
5 But he was wounded for our transgressions, and he was crushed for our iniquities, and the punishment that made us whole was upon him, and by his bruises we are healed.
Isaiah 55:8-9
1 Peter 3:18
18 For the Messiah also suffered for sins once for all, an innocent person for the guilty, so that he could bring you to God. He was put to death in a mortal body but was brought to life by the Spirit,