Genesis 17:21 But my covenant will I establish with Isaac, which Sarah shall bear unto thee at this set time in the next year. 10 I MC VC

Genesis 18:14 Is any thing too hard for the Lord? At the time appointed I will return unto thee, according to the time of life, and Sarah shall have a son. 16 I MC VC

Genesis 21:2 For Sarah conceived, and bare Abraham a son in his old age, at the set time of which God had spoken to him. 14 I MC VC