2 Abraham begot 1aIsaac, and Isaac begot 2bJacob, and Jacob begot 3cJudah and his 4dbrothers,
21 Abraham begot eight sons (Gen. 16:15; 21:2-3; 25:2). Among those eight, only Isaac is counted as the promised seed (Rom. 9:7-8). Hence, Christ is his descendant to fulfill God's promise given to Abraham and to him (Gen. 22:18; 26:4).