Gen Genesis, chapter Book of Genesis, chapter 17
And he that is eight days old shall be circumcised among you, every man child in yourf generations, he that is born in the house, or bought with money of any stranger, which [is] not of youri seed.
He that is born in youri house, and he that is bought with youri money, must needs be circumcised: and my covenant shall be in yourf flesh for an everlasting covenant.