'For Us' in the Bible

Then I heard the voice of the Lord, saying, “Whom shall I send, and who will go for Us?” Then I said, “Here am I. Send me!”

Lord, You will establish peace for us,Since You have also performed for us all that we have done.

But there the mighty and magnificent Lord will be for usA place of broad rivers and streams,Where no oar-driven boat will go,And on which no mighty and stately ship will pass.

But He was wounded for our transgressions,He was crushed for our wickedness [our sin, our injustice, our wrongdoing];The punishment [required] for our well-being fell on Him,And by His stripes (wounds) we are healed.