10 This is my covenant: Every male will be circumcised.
11 You shall circumcise the flesh of your foreskin.
12 When a baby boy is eight days old, he shall be circumcised, including the slave that is born in your house, or is bought with money, or is a stranger.
13 My covenant will be in your flesh for an everlasting covenant.
14 An uncircumcised male must be cut off from his people.
15 Your wife won't be called Sarai anymore, but Sarah.
16 I'll bless her and you will make her pregnant and have a son with her.
Abraham laughs at God
17 Abraham fell down laughing, and said to himself,
Will Sarah and I have a child when I'm 100 and she's 90 years old?
23-26 Abraham was ninety-nine years old when he circumcised himself, along with his thirteen-year-old son, Ishmael, and all of his slaves -- all in one day.
Circumcision of Abraham, Jean de Sy, Paris ca. 1355-1357
Abraham feeds God and two men
181-2 God appeared to Abraham as he sat at his tent door. 3-4 When Abraham looked up he saw three men standing in front of him. He said to them,
Wash your feet and rest yourselves under the tree. I'll get some bread while you comfort your hearts. After that, you can go.
24 What if there are fifty righteous people in Sodom? Will you kill everyone including the fifty righteous? 25 Shouldn't the judge of all the earth do right?
26 God said, "If I find fifty righteous people in Sodom, I'll spare the city for their sakes."
27-28 Abraham said, "I'm just dust and ashes, but what if there are forty-five righteous people?"
God said, "If I find forty-five, I won't destroy it."
29-32 Abraham repeated the same question, with forty, thirty, twenty, and ten. Each time God said he wouldn't kill everyone if he could find that many righteous people.