Any uncircumcised male ¹  who has not been circumcised in the flesh of his foreskin will be cut off ²  from his people – he has failed to carry out my requirement.” ³ 

Abraham took his son Ishmael and every male in his household (whether born in his house or bought with money) ¹  and circumcised them ²  on that very same day, just as God had told him to do.

“When a foreigner lives ¹  with you and wants to observe the Passover to the Lord, all his males must be circumcised, ²  and then he may approach and observe it, and he will be like one who is born in the land ³  – but no uncircumcised person may eat of it.