When God made his promise to Abraham, he swore an oath by himself—there was no one greater to swear an oath by.
the promise he made to our father Abraham.
Brothers and sisters, let me give you an example from everyday life. Once people make an official agreement, no one else can cancel it or change it.
If the benefits of this agreement depended on the law, then they would no longer depend on the promise. But God gave them to Abraham as a free gift through a promise.