Christians often point to Isaiah 53 and say that it is about Jesus.
The following verses in Isaiah 53 are often said to refer to Jesus:
He was despised and rejected by men; a man of sorrows, and acquainted with grief; and as one from whom men hide their faces he was despised, and we esteemed him not.Isaiah 53:3 (RSV)
Christians say that Isaiah 53:3 refers to the fact that Jesus was rejected by the Jews.
4 Surely he hath borne our griefs, and carried our sorrows: yet we did esteem him stricken, smitten of God, and afflicted.
5 But he was wounded for our transgressions, he was bruised for our iniquities: the chastisement of our peace was upon him; and with his stripes we are healed.
4 Surely he has borne our griefs and carried our sorrows; yet we esteemed him stricken, smitten by God, and afflicted. 5 But he was wounded [pierced] for our transgressions, he was bruised for our iniquities; upon him was the chastisement that made us whole, and with his stripes [wounds] we are healed.Isaiah 53:4-5 (RSV) [NIV]
Christians say that the above refers to vicarious atonement. Jesus “paid for our sins,” etc.