Genesis 21:2

¹¹By faith even Sarah herself received power to conceive, and she bore a child when she was past age, since she counted him faithful who had promised.

²²For it is written that Abraham had two sons, one by the servant, and one by the free woman.

¹⁴Is anything too hard for the LORD? At the set time I will return to you, when the season comes around, and Sarah will have a son.”

¹⁰He said, “I will certainly return to you at about this time next year; and behold, Sarah your wife will have a son.” Sarah heard in the tent door, which was behind him.

⁸He gave him the covenant of circumcision. So Abraham became the father of Isaac, and circumcised him the eighth day. Isaac became the father of Jacob, and Jacob became the father of the twelve patriarchs.

²⁴After these days Elizabeth his wife conceived, and she hid herself five months, saying, ²⁵“Thus has the Lord done to me in the days in which he looked at me, to take away my reproach among men.”

¹⁹God said, “No, but Sarah, your wife, will bear you a son. You shall call his name Isaac.^[+] I will establish my covenant with him for an everlasting covenant for his offspring after him.

³⁶Behold, Elizabeth your relative also has conceived a son in her old age; and this is the sixth month with her who was called barren.

²¹But I will establish my covenant with Isaac, whom Sarah will bear to you at this set time next year.”

¹⁶He said, “At this season next year, you will embrace a son.” She said, “No, my lord, you man of God, do not lie to your servant.”

¹⁷The woman conceived, and bore a son at that season when the time came around, as Elisha had said to her.