Galatians 4:22
For it is written that Abraham had two sons, one by the slave woman and one by the free woman;
Hebrews 11:11
By faith even Sarah herself received power to conceive seed, although she was past the age for child-bearing, because she counted Him faithful who had promised;
Acts 7:8
"Then he gave him a covenant of circumcision, and under this covenant he became the father of Isaac, whom he circumcised on the eighth day, and Isaac became the father of Jacob, and Jacob became the father of the twelve Patriarchs.
Luke 1:24-25
and after those days Elizabeth, his wife, Conceived, and she hid herself five months, saying.
Luke 1:36
"And behold your kinswoman, Elizabeth, she also has conceived a son in her old age, and this was the sixth month with her that was called barren.
Romans 9:9
For thus is the word of promise, According to this season I will come, and Sarah shall bear a son.