New American Standard Bible (NASB)
Genesis 17
21 But My covenant I will establish with Isaac, whom Sarah will bear to you at this season next year."
22 When He finished talking with him, God went up from Abraham.
23 Then Abraham took Ishmael his son, and all the servants who were born in his house and all who were bought with his money, every male among the men of Abraham’s household, and circumcised the flesh of their foreskin in the very same day, as God had said to him.
24 Now Abraham was ninety-nine years old 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 very same day Abraham was circumcised, and Ishmael his son.
27 All the men of his household, who were born in the house or bought with money from a foreigner, were circumcised with him.
Genesis 18
1 Now the Lord appeared to him by the oaks of Mamre, while he was sitting at the tent door in the heat of the day.
2 When he lifted up his eyes and looked, behold, three men were standing opposite him; and when he saw them, he ran from the tent door to meet them and bowed himself to the earth,
3 and said, "My Lord, if now I have found favor in Your sight, please do not pass Your servant by.
4 Please let a little water be brought and wash your feet, and rest yourselves under the tree;