Ezra 9:2

For they, the Jews who had previously returned from Babylonia, have taken of their daughters for themselves and for their sons, so that the holy seed, the children of Israel as a peculiar people, as a nation consecrated to Jehovah, have mingled themselves with the people of those lands; yea, the hand of the princes and rulers, of the leaders of the people, hath been chief in this trespass, which was a plain violation of the divine Law, Deuteronomy 7:2. The mixed marriages threatened the purity of Israel and imperiled the higher blessings connected therewith.