Treasury of Scripture Knowledge
"We will not give our daughters in marriage to the neighboring peoples, and we will not take their daughters in marriage for our sons.
Indeed, they have taken some of their daughters as wives for themselves and for their sons, so that the holy race has become intermingled with the local residents. Worse still, the leaders and the officials have been at the forefront of all of this!"
Then Ezra the priest stood up and said to them, "You have behaved in an unfaithful manner by taking foreign wives! This has contributed to the guilt of Israel.
2 Corinthians 6:14
Do not become partners with those who do not believe, for what partnership is there between righteousness and lawlessness, or what fellowship does light have with darkness?
On that day the book of Moses was read aloud in the hearing of the people. They found written in it that no Ammonite or Moabite may ever enter the assembly of God,
and you then take his daughters for your sons, and when his daughters prostitute themselves to their gods, they will make your sons prostitute themselves to their gods as well.
You must not intermarry with them. Do not give your daughters to their sons or take their daughters for your sons,
They took the Canaanites' daughters as wives and gave their daughters to the Canaanites; they worshiped their gods as well.