Genesis 34:14

And they said unto them
Levi and Simeon, to Hamor and Shechem: we cannot do this thing, to give our sister to one that is
uncircumcised;
not that there was any law against it at that time; and there were, on the other hand, precedents for it both in Isaac and Jacob, who had married the daughters of uncircumcised persons; nor indeed do they plead any law, only that it was not becoming their character, nor agreeably to their religion, nor honourable in their esteem: for that [were] a reproach unto us;
and they should be reflected upon for slighting the institution of circumcision, which was of God: so they pretend it might be interpreted, should they enter into affinity with uncircumcised persons.