Galatians 4:22
For it is written that Abraham had two sons, one by the slave-girl and one by the free woman.
Hebrews 11:11
Through faith even Sarah herself received strength to become a mother--although she was past the time of life for this--because she judged Him faithful who had given the promise.
Acts 7:8
"Then He gave him the Covenant of circumcision, and under this Covenant he became the father of Isaac--whom he circumcised on the eighth day. Isaac became the father of Jacob, and Jacob became the father of the twelve Patriarchs.
Luke 1:24-25
and in course of time his wife Elizabeth conceived, and kept herself secluded five months.
Luke 1:36
And see, your relative Elizabeth--she also has conceived a son in her old age; and this is the sixth month with her who was called barren.
Romans 9:9
For the words are the language of promise and run thus, "About this time next year I will come, and Sarah shall have a son."