Isaiah 7:11

7:11 “Ask for a confirming sign from the Lord your God. You can even ask for something miraculous.”

Isaiah 38:7

38:7 Isaiah replied, “This is your sign from the Lord confirming that the Lord will do what he has said:

Isaiah 38:22

38:22 Hezekiah said, “What is the confirming sign that I will go up to the Lord’s temple?”