www.lds.org “Abraham made covenants with God when he received the gospel, when he was ordained a high priest, and when he entered into celestial marriage. In these covenants, God promised great blessings to Abraham and his family. These blessings, which extend to all of Abraham’s seed, are called the Abrahamic covenant.”
Holman Bible Dictionary; “God made His second covenant with Abraham (Gen. 15:18; 17:2). As the covenant with Noah involved a righteous man (Gen. 6:8-9), so the covenant with Abraham involved a man of faith (Gen. 15:6). God initiated His covenant with this type of person, but this does not mean that the person earned God’s covenant with good works. Rather, this type of person was open to God’s actions and could be directed by God for His purposes. The covenant with Abraham, like that with Noah, involved divine promises, not human obedience. God promised to give the land of Canaan to Abraham’s descendants after a long sojourn to a foreign land.”
Genesis 15:5-6; “And he brought him forth abroad, and said, Look now toward heaven, and tell the stars, if thou be able to number them: and he said unto him, So shall thy seed be. 6 And he believed in the LORD; and he counted it to him for righteousness.”
Abraham did not receive the gospel, he was not ordained a high priest and he didn’t enter into celestial marriage. God made Abraham cast Hagar out to the wilderness because she was not part of the promise God had made with Abraham. Abraham and Sarah made a grave mistake by having him father a child (Ishmael) through Hagar.