Blessings to all,
Welcome again, I am Jerry, this portion of our study covers:

Ishmael's Inheritance - Because Of Abraham

God holds to the promise that He has made. As a sign of keeping this covenant, God had a new requirement for Abraham. He and every male of his household, born or bought, and every male in every generation to come, must be circumcised. This is the ritual removal of the foreskin. Those who were not circumcised would not be included in this covenant between God and Abraham's people.

That's already a lot of change for one meeting, but God is not done yet. He truly surprises Abraham, telling him that Sarai's name must also be changed. She will now be known as Sarah, and she and Abraham would have a son after all. In reverence, or gratitude, or pure surprise, or perhaps all three, Abraham falls facedown and laughs. He's shocked at the mere suggestion of Sarah conceiving and bearing a child.

Then Abraham has another thought: What about Ishmael? 

God has already given a promise of blessing on Ishmael, spoken to his mother Hagar (Genesis 16:10–12). Here, though God will again promise to bless Ishmael abundantly, the covenant promises between God and Abraham will not pass through Ishmael. Instead, they will pass to Isaac, Abraham's yet-to-be conceived son with Sarah. That son will have been born by this time the following year.

With that, God concludes His revelations and "leaves," at least symbolically giving Abraham an opportunity to make a decision.  Abraham's head must have been spinning, but he did not hesitate to begin to obey God. That very day, he went home and circumcised himself, Ishmael, and the hundreds of other males in his large company. Abraham's immediate obedience is further evidence that he was choosing to trust the Lord and to take Him at His word.

It is time to open our hearts, minds, and souls to the Word Of GOD.

Our scripture will be coming from:

Genesis 17:20-27 KJV 
[20] And as for Ishmael, I have heard thee: Behold, I have blessed him, and will make him fruitful, and will multiply him exceedingly; twelve princes shall he beget, and I will make him a great nation.
[21] But my covenant will I establish with Isaac, which Sarah shall bear unto thee at this set time in the next year.
[22] And he left off talking with him, and God went up from Abraham.
[23] And Abraham took Ishmael his son, and all that were born in his house, and all that were bought with his money, every male among the men of Abraham's house; and circumcised the flesh of their foreskin in the selfsame day, as God had said unto him.
[24] And Abraham was ninety years old and nine, when he was circumcised in the flesh of his foreskin.
[25] And Ishmael his son was thirteen years old, when he was circumcised in the flesh of his foreskin.
[26] In the selfsame day was Abraham circumcised, and Ishmael his son.
[27] And all the men of his house, born in the house, and bought with money of the stranger, were circumcised with him.