Genesis 21:26

23 and now, swear to me by God here: thou dost not lie to me, or to my continuator, or to my successor; according to the kindness which I have done with thee thou dost with me, and with the land in which thou hast sojourned.`

24 And Abraham saith, `I -- I do swear.`

25 And Abraham reasoned with Abimelech concerning the matter of a well of water which Abimelech`s servants have taken violently away,

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.

29 And Abimelech saith unto Abraham, `What [are] they -- these seven lambs which thou hast set by themselves?`