Sarah dies at age 127 and is buried in the Machpelah Cave in Hebron, which Abraham purchases from Ephron the Hittite for four hundred shekels of silver.
Abraham’s servant Eliezer is sent, laden with gifts, to Charan, to find a wife for Isaac. At the village well, Eliezer asks G‑d for a sign: when the maidens come to the well, he will ask for some water to drink; the woman who will offer to give his camels to drink as well shall be the one destined for his master’s son.
Rebecca, the daughter of Abraham’s nephew Bethuel, appears at the well and passes the “test.” Eliezer is invited to their home, where he repeats the story of the day’s events. Rebecca returns with Eliezer to the land of Canaan, where they encounter Isaac praying in the field. Isaac marries Rebecca, loves her, and is comforted over the loss of his mother.
Abraham takes a new wife, Keturah (Hagar), and fathers six additional sons, but Isaac is designated as his only heir. Abraham dies at age 175 and is buried beside Sarah by his two eldest sons, Isaac and Ishmael.
Source: chabad.org