The Popular Commentary by Paul E. Kretzmann - Genesis 17:15-22
A Child Promised to Sarah v. 15. And God said unto Abraham, As for Sarai, thy wife, thou shalt not call her name Sarai, but Sarah shall her name be. This change of names is significant, for the wife of Abraham, heretofore known as Sarai, "the princely," "heroine," was hereafter to be called Sarah, "princess," as the ancestress of princes and kings. Thus the promise of God narrowed down, first from a member of Abraham's household to a son of his own body, and now to his own son by Sarah, his... read more
Matthew Henry's Concise Commentary on the Bible - Genesis 17:15-22
15-22 Here is the promise made to Abraham of a son by Sarai, in whom the promise made to him should be fulfilled. The assurance of this promise was the change of Sarai's name into Sarah. Sarai signifies my princess, as if her honour were confined to one family only; Sarah signifies a princess. The more favours God confers upon us, the more low we should be in our own eyes. Abraham showed great joy; he laughed, it was a laughter of delight, not of distrust. Now it was that Abraham rejoiced to... read more