Isa 53:10-12, 2 Cor 5:21, Titus 2:14
In the Old Testament it was foretold that Christ would come and become the ransom for the forgiveness of our sins. (Isa 53:10-12)
Isa 53:10 Yet it pleased the Lord to bruise him; he hath put him to grief: when thou shalt make his soul an offering for sin, he shall see his seed, he shall prolong his days, and the pleasure of the Lord shall prosper in his hand. 11 He shall see of the travail of his soul, and shall be satisfied: by his knowledge shall my righteous servant justify many; for he shall bear their iniquities. 12 Therefore will I divide him a portion with the great, and he shall divide the spoil with the strong; because he hath poured out his soul unto death: and he was numbered with the transgressors; and he bare the sin of many, and made intercession for the transgressors.
Jesus became the ransom to save us. (Mk 10:45, 2 Cor 5:21, Titus 2:14)
Mk 10:45 For even the Son of man came not to be ministered unto, but to minister, and to give his life a ransom for many.
2 Cor 5:21 For he hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him.
Titus 2:14 Who gave himself for us, that he might redeem us from all iniquity, and purify unto himself a peculiar people, zealous of good works.