Nehemiah 10:30
We will not give our daughters to the peoples of the land or take their daughters for our sons.
Exodus 34:16
and you take of their daughters for your sons, and their daughters whore after their gods and make your sons whore after their gods.
Deuteronomy 7:3
You shall not intermarry with them, giving your daughters to their sons or taking their daughters for your sons,
Ezra 9:1-3
After these things had been done, the officials approached me and said, "The people of Israel and the priests and the Levites have not separated themselves from the peoples of the lands with their abominations, from the Canaanites, the Hittites, the Perizzites, the Jebusites, the Ammonites, the Moabites, the Egyptians, and the Amorites.
Ezra 9:12-14
Therefore do not give your daughters to their sons, neither take their daughters for your sons, and never seek their peace or prosperity, that you may be strong and eat the good of the land and leave it for an inheritance to your children forever.'
Ezra 10:10-12
And Ezra the priest stood up and said to them, "You have broken faith and married foreign women, and so increased the guilt of Israel.