The Abrahamic Covenant is everlasting. It doesn't end.I quoted the NT. I quoted Paul and Peter. They appealed to a time before the world began. A promise to humanity before the first human (Adam) was formed.
Why are you talking about Genesis?
Christ is the heir of all things. The heir of Abraham. The heir of Adam. He is King of Kings. Lord of Lord. In Him, all men are equal. Without Him all men are condemned.