Galatians 4:22
Surely it is written in the Law that Abraham had two sons, one by the slave-woman and one by the free-woman;
Hebrews 11:11
It was by faith that even Sara got strength to conceive, bearing a son when she was past the age for it ??because she considered she could rely on Him who gave the promise.
Acts 7:8
God also gave him the covenant of circumcision. So Abraham became the father of Isaac, whom he circumcised on the eighth day, Isaac was the father of Jacob, and Jacob of the twelve patriarchs.
Luke 1:24-25
After those days his wife Elizabeth conceived; and for five months she concealed herself.
Luke 1:36
Look, there is your kinswoman Elizabeth! Even she has conceived a son in her old age, and she who was called barren is now in her sixth month;
Romans 9:9
For when God said, I will come about this time and Sara shall have a son, that was a word of promise.