Did Abraham exist?

Israel today;
God's Covenant with Abraham fulfilled.

Genesis 12

"Now the Lord had said to Abram (Abraham): Get out of your
country, from your family and from your father's house, to
a land that I will show you.

"To your descendants I will give this land."

Exodus 6

And God spoke to Moses;

"Then you shall know that I am the LORD your God who brings you out from under the burdens of the Egyptians. And I will bring you into the land which I swore to give to Abraham, Isaac, and Jacob; and I will give it to you as a heritage: I am the LORD.'"

Psalms 105

He is the LORD our God;
His judgments are in all the earth.
He remembers His covenant forever,
The word which He commanded, for a thousand generations,
The covenant which He made with Abraham,
And His oath to Isaac,
And confirmed it to Jacob for a statute,
To Israel as an everlasting covenant,
Saying, "To you I will give the land of Canaan
As the allotment of your inheritance,"