Genesis 34:12-15
English Standard Version
13The sons of Jacob answered Shechem and his father Hamor deceitfully, because he had defiled their sister Dinah.
14They said to them, "We cannot do this thing, to give our sister to one who is uncircumcised, for that would be a disgrace to us.
15Only on this condition will we agree with you — that you will become as we are by every male among you being circumcised.
