Who was Sarah?

Princess, the wife and at the same time the half-sister of Abraham (Gen. 11:29; 20:12). This name was given to her at the time that it was announced to Abraham that she should be the mother of the promised child.

Sarah first appears in Genesis 17:15. In this repository’s biblical text, this figure is associated with 32 verse mentions across 4 books, most notably Genesis, Numbers, Isaiah, Romans.