A TREATY WITH ABIMELCH

And Abraham set seven ewe lambs of the flock by themselves.
And Abimelech said unto Abraham, What mean these seven ewe lambs which thou hast set by themselves?
And he said, For these seven ewe lambs shalt thou take of my hand, that they may be a witness unto me, that I have digged this well.

ISAAC’S BIRTH PROMISED BY GOD

Then God said to Abraham, “As for Sarai your wife, you shall not call her name Sarai (my princess), but her name will be Sarah (Princess).
I will bless her, and indeed I will also give you a son by her. Yes, I will bless her, and she shall be a mother of nations; kings of peoples will come from her.

ABRAHAM AND THE COVENANT OF CIRCUMCISION

Abraham And The Covenant Of Circumcision. This is [the sign of] My covenant, which you shall keep and faithfully obey, between Me and you and your descendants after you: Every male among you shall be circumcised.
And you shall be circumcised in the flesh of your foreskins, and it shall be the sign (symbol, memorial) of the covenant between Me and you.