God will bless believers through the covenant promise to Abraham in Genesis 12:1-3. God gave him this promise: In you all the nations shall be blessed. That blessing comes to us through Abraham's Seed, who is Christ. Now to Abraham and his Seed were the promises made. He does not say, and to seeds as of many, but of one, and to your Seed, who is Christ (Galatians 3:16).
Old Testament believers had the promise of Messiah who was coming. As believers today, we know that He has come that the blessing of Abraham might come upon the Gentiles in Christ Jesus, that we might receive the promise of the Spirit through faith (Galatians 3:14).
As believers, we receive the blessing as Abraham did in Genesis. He was blessed by God as a believer. And he believed in the LORD, and He accounted it unto him for righteousness (Genesis 15:6). As believers, we are blessed with the righteousness of God in Christ (2 Corinthians 5:21).
Abraham was blessed by God in Genesis, through the covenant promise. We are blessed today as believers in Christ, through the covenant fulfillment. Jesus Christ is the same yesterday, today, and forever"(Hebrews 13:8). Jesus said, Your father Abraham rejoiced to see my day, and he saw it and was glad (John 8:56).