'Ancestor' in the Bible

"Go and tell Hezekiah: 'This is what the Lord God of your ancestor David says: "I have heard your prayer; I have seen your tears. Look, I will add fifteen years to your life,

Then you will find joy in your relationship to the Lord, and I will give you great prosperity, and cause crops to grow on the land I gave to your ancestor Jacob." Know for certain that the Lord has spoken.