Matthew 1:2
Abraham had a son named Isaac; Isaac had a son named Jacob and Jacob's sons were Judah and his [eleven] brothers.
Acts 7:8
And God gave Abraham the Agreement which required circumcision [as an identifying mark] so when Abraham fathered Isaac he circumcised him when he was eight days old. Then Isaac had a son, Jacob; and Jacob had [as sons] the twelve patriarchs [i.e., ruling fathers of families].
Romans 9:7
Neither are all [Jewish] people children [of God], [simply] because they are Abraham's descendants. But [Gen. 21:12 says], "It is through Isaac that you [i.e., Abraham] will have descendants."
Hebrews 11:18
[even though] he had been told [by God, Gen. 21:12], "Your descendants will be traced through Isaac."
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