Rebekah first saw Isaac as he was coming from the way of Beer-lahai-roi, the dwelling-place of Hagar, whither he had gone after the death of his mother, for the purpose of reuniting his father with Hagar, or, as she is also called, Keturah.
Hagar bore him six sons, who, however, did scant honor to their father, for they all were idolaters. Abraham, therefore, during his own lifetime, sent them away from the presence of Isaac, that they might not be singed by Isaac's flame, and gave them the instruction to journey eastward as far as possible. There he built a city for them, surrounded by an iron wall, so high that the sun could not shine into the city. But Abraham provided them with huge gems and pearls, their lustre more brilliant than the light of the sun, which will be used in the Messianic time when "the moon shall be confounded and the sun ashamed." Also Abraham taught them the black art, wherewith they held sway over demons and spirits. It is from this city in the east that Laban, Balaam, and Balaam's father Beor derived their sorceries.