Genesis 17:8-17

Then Abraham fell upon his face, and laughed, and said in his heart, Shall a child be born unto him that is an hundred years old? and shall Sarah, that is ninety years old, bear?

It is profitable to observe, how God's purposes are accomplished, concerning the fulfilment of this promise. As this child was a child of promise, Sarah shall be left past the period allowed to child-bearing, that God's grace in the gift, might more illustriously appear. Surely that song of the Church, sung in after ages, was peculiarly sweet here. Isaiah 54:1; Galatians 4:27 - And is not the verse following delightful? Yes! if you and I can personally adopt it. Galatians 4:28