15 Then God said to Abraham, “Regarding Sarai, your wife—her name will no longer be Sarai. From now on her name will be Sarah.* 16 And I will bless her and give you a son from her! Yes, I will bless her richly, and she will become the mother of many nations. Kings of nations will be among her descendants.”
17:15 Sarai and Sarah both mean “princess”; the change in spelling may reflect the difference in dialect between Ur and Canaan.