Hebrews 11, good choice. Did you read through to the end. Not one of those people is called a child of God. Not one is called an heir to the kingdom. There’s only one way to get that, and Adam, Abel, and Abraham all didn’t have it.
Yes...I read it to the end. It's why I selected it.
39And all these, having gained approval through their faith, did not receive what was promised, 40because God had provided something better for us, so that apart from us they would not be made perfect.
But...if you want to see the word heir as it pertains to Abraham and those who believe in Christ...as did Abraham....here you go:
There is neither Jew nor Greek, there is neither slave nor free man, there is neither male nor female; for you are all one in Christ Jesus. 29And if you belong to Christ, then you are Abraham's descendants, heirs according to promise (Gal 3:29).
Any believer in Christ is an heir to the promise that was extended to Abraham way back.