Genesis 34:13-16

And the sons of Jacob answered Shechem and Hamor his father deceitfully, and said, because he had defiled Dinah their sister: And they said unto them, We cannot do this thing, to give our sister to one that is uncircumcised; for that {were} a reproach unto us: But in this will we consent unto you: If ye will be as we {be}, that every male of you be circumcised; Then will we give our daughters unto you, and we will take your daughters to us, and we will dwell with you, and we will become one people.