2
aSo Sarah conceived and bore a son to Abraham in his old age, at
bthe appointed time of which God had spoken to him.
a
Acts 7:8, Galatians 4:22, Hebrews 11:11
Acts 7
8
"And He agave him the covenant of circumcision; and so bAbraham became the father of Isaac, and circumcised him on the eighth day; and cIsaac became the father of Jacob, and dJacob of the twelve epatriarchs.
Galatians 4
22
For it is written that Abraham had two sons, aone by the bondwoman and bone by the free woman.
Hebrews 11
11
By faith even aSarah herself received ability to conceive, even beyond the proper time of life, since she considered Him bfaithful who had promised.
Other references for Genesis 21:2