According to the Book of Genesis, Hagar[a] was an Egyptian slave, a handmaiden of Sarah (then known as Sarai), [2] whom Sarah gave to her own husband Abram (later renamed Abraham) as a wife to bear him a child. Abraham's firstborn son, through Hagar, Ishmael, became the progenitor of the Ishmaelites, generally taken to be the Arabs. More @Wikipedia
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