Genesis 34:13-17
34:13 Jacob’s sons answered Shechem and his father Hamor deceitfully when they spoke because Shechem had violated their sister Dinah.
34:14 They said to them, “We cannot give our sister to a man who is not circumcised, for it would be a disgrace to us.
34:15 We will give you our consent on this one condition: You must become like us by circumcising all your males.
34:16 Then we will give you our daughters to marry, and we will take your daughters as wives for ourselves, and we will live among you and become one people.
34:17 But if you do not agree to our terms by being circumcised, then we will take our sister and depart.”