Nehemiah 10:30
and that we would not give our daughters to the peoples of the land, nor take their daughters for our sons;
Exodus 34:16
and you take of their daughters to your sons, and their daughters play the prostitute after their gods, and make your sons play the prostitute after their gods.
Deuteronomy 7:3
neither shall you make marriages with them; your daughter you shall not give to his son, nor shall you take his daughter for your son.
Ezra 9:1-3
Now when these things were completed, the leaders approached me and said, "The people of Israel, and the priests and the Levites, have not separated themselves from the peoples of the lands, following their abominations, even those of the Canaanites, the Hittites, the Perizzites, the Jebusites, the Ammonites, the Moabites, the Egyptians, and the Amorites.
Ezra 9:12-14
Now therefore do not give your daughters to their sons, neither take their daughters to your sons, nor seek their peace or their prosperity forever; 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
Ezra the priest stood up, and said to them, "You have trespassed, and have married foreign women, to increase the guilt of Israel.