MSTC(i)
15 And God said unto Abraham, "Sarai, thy wife, shall no more be called Sarai: but Sara shall her name be.
16 For I will bless her and give thee a son of her; and will bless her so that people, yea and kings of people, shall spring of her."
17 And Abraham fell upon his face and laughed, and said in his heart, "Shall a child be born unto him that is a hundred years old? And shall Sara, that is ninety years old, bear?"
18 And Abraham said unto God, "O that Ishmael might live in thy sight!"
19 Then said God, "Nay. Sara thy wife shall bear thee a son, and thou shalt call his name Isaac. And I will make my covenant with him, that it shall be an everlasting covenant unto his seed after him.