Genesis 34:13-17

13But because Shechem had defiled their sister Dinah, Jacob’s sons answered him and his father Hamor deceitfully. 14“We cannot do such a thing,” they said. “To give our sister to an uncircumcised man would be a disgrace to us. 15We will consent to this on one condition, that you become circumcised like us—every one of your males. 16Then we will give you our daughters and take your daughters for ourselves. We will dwell among you and become one people. 17But if you will not agree to be circumcised, then we will take our sister and go.”