The Patriarchs ( Avot or Abot, singular Ab or Aramaic: אבא Abba) of the Bible, when narrowly defined, are Abraham, his son Isaac, and Isaac's son Jacob, also named Israel, the ancestor of the Israelites. These three figures are referred to collectively as the patriarchs of Judaism, and the period in which they lived is known as the patriarchal age. They play significant roles in Hebrew scripture during and following their lifetimes. They are used as a significant marker by God in revelations and promises, and continue to play important roles in the Abrahamic faiths. More widely, the term Patriarchs can be used to refer to the twenty ancestor-figures between Adam and Abraham. The first ten of these are called the Antediluvian patriarchs, because they came before the Flood. Judaism and Islam hold that the patriarchs and their primary wives – Sarah (wife of Abraham), Rebekah (wife of Isaac) and Leah (one of the wives of Jacob) – (known as the Matriarchs), are entombed at Machpelah in Hebron, a site held holy by Jews, Muslims, and Christians. Only Rachel, Jacob's favorite wife, is said to be buried separately in the Tomb of Rachel, near Bethlehem, where she is believed to have died in childbirth. More broadly, the term can also refer to any of the major figures of the Book of Genesis, including the lineage of Adam, before the Great Flood, and the lineage of Noah to repopulate the earth after the Flood.