'Confirming' in the Bible

So God said to Noah, "This is the guarantee of the covenant that I am confirming between me and all living things that are on the earth."

This will be a confirming sign for you that will be fulfilled through your two sons, Hophni and Phinehas: in a single day they both will die!

Hezekiah had said to Isaiah, "What is the confirming sign that the Lord will heal me and that I will go up to the Lord's temple the day after tomorrow?"

Isaiah replied, "This is your sign from the Lord confirming that the Lord will do what he has said. Do you want the shadow to move ahead ten steps or to go back ten steps?"

In those days Hezekiah was stricken with a terminal illness. He prayed to the Lord, who answered him and gave him a sign confirming that he would be healed.

"Ask for a confirming sign from the Lord your God. You can even ask for something miraculous."

For this reason the sovereign master himself will give you a confirming sign. Look, this young woman is about to conceive and will give birth to a son. You, young woman, will name him Immanuel.

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

Hezekiah said, "What is the confirming sign that I will go up to the Lord's temple?"

If I am not an apostle to others, at least I am to you, for you are the confirming sign of my apostleship in the Lord.