Born Sarai, renamed Sarah ('princess') by God. Wife of Abraham, she was initially barren and doubted God's promise of a son — laughing when she overheard the angels announce she would conceive. She gave birth to Isaac at age 90, miraculous testimony to God's faithfulness.
And Abram and Nahor took them wives: the name of Abram’s wife was Sarai; and the name of Nahor’s wife, Milcah, the daughter of Haran, the father of Milcah, and the father of Iscah.Genesis 11:29, KJV
Genesis 17:15
And God said unto Abraham, As for Sarai thy wife, thou shalt not call her name Sarai, but Sarah shall her name be.Genesis 17:15, KJV
Genesis 18:12
Therefore Sarah laughed within herself, saying, After I am waxed old shall I have pleasure, my lord being old also?Genesis 18:12, KJV
Genesis 21:2
For Sarah conceived, and bare Abraham a son in his old age, at the set time of which God had spoken to him.Genesis 21:2, KJV
Hebrews 11:11
Through faith also Sara herself received strength to conceive seed, and was delivered of a child when she was past age, because she judged him faithful who had promised.Hebrews 11:11, KJV
See how Sarah connects to every other figure in Scripture.