Genesis 21:26-28

Young's Literal Translation

²⁶ and Abimelech saith, `I have not known who hath done this thing, and even thou didst not declare to me, and I also, I have not heard save to-day.'

²⁷ And Abraham taketh sheep and oxen, and giveth to Abimelech, and they make, both of them, a covenant;

²⁸ and Abraham setteth seven Lambs of the flock by themselves.