I believe that Abraham was concerned with being obedient to God!
Nearly every action in Abraham's life shows his great faith in God. He left his country and countrymen never to return (
Heb. 11:8-16).
He believed the promise of a son though such a birth was naturally impossible (
Rom. 4:18-21).
He cast out a son, Ishmael when Sarah and God commanded it (
Gen. 21:9-14).
He was even willing to offer
Isaac, the son of promise,
when God demanded it (
Heb. 11:17-19).
Because of his great faith, he enjoyed the victory of faith (
Gen. 22:12).
As seen in the illustrations above, whatever God wanted Abraham to do, he did. Whether it was leaving his homeland, casting out one son or sacrificing another, he obeyed God without question or qualm.
In
Genesis 18:19 God states one of the reasons He was able to bless Abraham so abundantly and regard him as His friend. He said........
"For I have known him, in order that he may command his children and his household after him, that they keep the way of the Lord, to do righteousness and justice, that the Lord may bring to Abraham what He has spoken to him."
Abraham's devotion to God not only caused him to walk obediently but also allowed him to influence others, especially those in his own house, to do the same.