Genesis 34:13

Shechem said to her father and to her brothers, "Let me find favor in your eyes, and whatever you will tell me I will give.

Ask me a great amount for a dowry, and I will give whatever you ask of me, but give me the young lady as a wife.

and said to them, "We can't do this thing, to give our sister to one who is uncircumcised; for that is a reproach to us.

Only on this condition will we consent to you. If you will be as we are, that every male of you be circumcised;