Matthew traces Jesus' lineage to Abraham, who God promised that his offspring would bless all nations. Abraham's obedience in offering Isaac prefigures Jesus' sacrifice. Jesus, Abraham's descendant, is the promised blessing, sacrificing Himself for humanity's sins. (References: Genesis 22:17-18, Hebrews 9:28 (NIV), 1John 4:10 (NIV), Genesis 15:5-6, Genesis 17:4-7)