THE BIRTH OF ISAAC

The LORD graciously remembered and visited Sarah as He had said, and the LORD did for her as He had promised.
So Sarah conceived and gave birth to a son for Abraham in his old age, at the appointed time of which God had spoken to him.
Abraham named his son Isaac (laughter), the son to whom Sarah gave birth.

GOD DESTROYS SODOM AND GOMORRAH

Abraham started out early the next morning to the place where he [only the day before] had stood before the LORD;
and he looked down toward Sodom and Gomorrah, and toward all the land of the valley [of the Dead Sea]; and he saw, and behold, the smoke of the land went up like the smoke of a kiln (pottery furnace).

THE LORD APPEARED TO ABRAHAM AT MAMRE

When Abraham raised his eyes and looked up, behold, three men were standing [a little distance] from him. When he saw them, he ran from the tent door to meet them and bowed down [with his face] to the ground,
and Abraham said, “My lord, if now I have found favor in your sight, please do not pass by your servant

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.