Genesis 34:13-17

13And the sons of Jacob answered Shechem and Hamor his father deceitfully, and spoke — because he had defiled Dinah their sister —

14and said to them, We cannot do this, to give our sister to one that is uncircumcised; for that [were] a reproach to us.

15But only in this will we consent to you, if ye will be as we, that every male of you be circumcised;

16then will we give our daughters to you, and take your daughters to us, and we will dwell with you, and be one people.

17But if ye do not hearken to us, to be circumcised, then will we take our daughter and go away.