Bereshis 21:27-29

Orthodox Jewish Bible

²⁷ And Avraham took tzon and oxen, and gave them unto Avimelech; and both of them made a brit.

²⁸ And Avraham set apart seven ewe lambs of the tzon by themselves.

²⁹ And Avimelech said unto Avraham, What mean these seven ewe lambs which thou hast set apart by themselves?