Bereshis 21:26-28

Orthodox Jewish Bible

²⁶ And Avimelech said, I know not who hath done this thing; neither didst thou tell me, neither yet heard I of it, but today.

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.