Exodus 12:44

New Century Version

If someone buys a slave and circumcises him, the slave may eat the Passover.

Cross References

Genesis 17:23

Then Abraham gathered Ishmael, all the males born in his camp, and the slaves he had bought. So that day Abraham circumcised every man and boy in his camp as God had told him to do.

Leviticus 22:11

But if the priest buys a slave with his own money, that slave may eat the holy offerings; slaves who were born in his house may also eat his food.