To what does the "healing" (Isaiah 53:5) refer?

To what does the "healing" (Isaiah 53:5) refer?

The spiritual condition of Israel in Isaiah 1:5, 6 is an untreated disease that increases its corruption. They would not listen to God Word and be healed (6:10). John cites this passage in his gospel (12:40), perhaps hinting that the sign miracles, in John, foreshadow God’s healing of the nation in the future. That healing is mentioned often in Isaiah (30:26; 57:18, 19) and embraces the spiritual well-being and wholeness ("peace," 53:5) into which the Lord will bring them when He returns. At that time, a "saved nation" (Romans 11:26) will welcome the Savior they rejected and exclaim, "With His stripes, we are healed."

D. Oliver