Isaiah 53:4-6
He was pierced for our transgressions.
4 Surely he has borne our sickness and carried our suffering; yet we considered him plagued, struck by God, and afflicted.
5 But he was pierced for our transgressions. He was crushed for our iniquities. The punishment that brought our peace was on him; and by his wounds we are healed.
6 All we like sheep have gone astray. Everyone has turned to his own way; and Yahweh has laid on him the iniquity of us all.
He was pierced for our transgressions.
To declare the substitutionary suffering of the Servant for the sins of the people.
In the context of Israel's suffering and exile, the servant's role is clarified as bearing not only national affliction but the deeper problem of sin.
The Suffering Servant Bears Sin and Is Vindicated by the LORD
The LORD saves sinners through the innocent Servant who suffers in their place, bears their sin, and is vindicated after offering himself for many.