John 1:29:

The next day John seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world.

See also:

How to be Saved from Your Sins
Objection: We Cannot Demand Healing from God Because God Is Sovereign
Objection: Jesus Was Not Really PUNISHED for Our Sins; He Just Shed Blood to Atone for Them
Objection: Mark 16:18 Does Not Say, “They Shall Recover IF They Have Enough Faith,” Yet Faith Healers Blame the Sick for Not Believing
Objection: If You Were Already Healed (Past Tense), It Would Make No Sense to Call for the Elders to GET Healing