Exodus 12:44
After you have circumcised your purchased slave he may eat of it.
Genesis 17:12-13
For the generations to come every male among you who is eight days old must be circumcised. This includes those born in your household or bought with money from a foreigner, those who are not your offspring.
Genesis 17:23
On that very day Abraham took his son Ishmael and all those born in his household or bought with his money, every male in his household, and circumcised them, as God told him.
Treasury of Scripture Knowledge
Summary
But every man's servant that is bought for money, when thou hast circumcised him, then shall he eat thereof.
Circumcised
General references
Bible References
Circumcised
Genesis 17:12
For the generations to come every male among you who is eight days old must be circumcised. This includes those born in your household or bought with money from a foreigner, those who are not your offspring.
General references
Leviticus 25:44
You may have male and female slaves, but buy them from the nations around you.