Araham's Offspring
Abraham's Offspring to be "Reckonned" through Isaac
Ge 21:12 But God said to him, “Do not be so distressed about the boy and your maidservant. Listen to whatever Sarah tells you, because it is through Isaac that your offspring will be reckoned.
Ro 9:7 Nor because they are his descendants are they all Abraham’s children. On the contrary, “It is through Isaac that your offspring will be reckoned.”
Heb 11:18 even though God had said to him, “It is through Isaac that your offspring will be reckoned.”