Galatians 4:22
For the Scripture says that Abraham had two sons, one by a slave girl, the other by a free woman.
Hebrews 11:11
By faith Sarah received strength to become pregnant, and actually gave birth to a child, although she was past the time of life for it, because she thought that He who made her the promise was to be trusted.
Acts 7:8
And with Abraham He made the sacred compact of circumcision, and he became the father of Isaac and circumcised him on the eighth day, and Isaac became the father of Jacob, and Jacob of the twelve patriarchs.
Luke 1:24-25
So after this his wife Elizabeth became pregnant, and she kept herself in seclusion for five months, saying,
Luke 1:36
And listen! your relative, Elizabeth, has herself too become pregnant, although she is old, and this is the sixth month with her who was called barren.
Romans 9:9
For this is the language of the promise, "About this time next year I will come back, and Sarah will have a son."