Genesis 34:13

11And Shechem said unto her father and unto her brethren, Let me find grace in your eyes, and what ye shall say unto me I will give.

12Ask me never so much dowry and gift, and I will give according as ye shall say unto me: but give me the damsel to wife.

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

14And 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:

15But in this will we consent unto you: If ye will be as we be, that every male of you be circumcised;