Nehemiah 13:23

In those days also saw I the Jews who had married women of Ashdod, of Ammon, and of Moab:

Nehemiah 10:30

and that we would not give our daughters to the peoples of the land, nor take their daughters for our sons;

Ezra 9:1-2

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 10:10

Ezra the priest stood up, and said to them, "You have trespassed, and have married foreign women, to increase the guilt of Israel.

Nehemiah 13:1

On that day they read in the book of Moses in the audience of the people; and therein was found written, that an Ammonite and a Moabite should not enter into the assembly of God forever,

1 Samuel 5:1

Now the Philistines had taken the ark of God, and they brought it from Ebenezer to Ashdod.

Ezra 9:11-12

which you have commanded by your servants the prophets, saying, 'The land, to which you go to possess it, is an unclean land through the uncleanness of the peoples of the lands, through their abominations, which have filled it from one end to another with their filthiness.

Ezra 10:44

All these had taken foreign wives; and some of them had wives by whom they had children.

Nehemiah 4:7

But it happened that when Sanballat, Tobiah, the Arabians, the Ammonites, and the Ashdodites heard that the repairing of the walls of Jerusalem went forward, and that the breaches began to be filled, then they were very angry;

2 Corinthians 6:14

Do not be unequally yoked with unbelievers, for what fellowship have righteousness and iniquity? Or what fellowship has light with darkness?

Treasury of Scripture Knowledge

Summary

In those days also saw I Jews that had married wives of Ashdod, of Ammon, and of Moab:

Bible References

Married

Nehemiah 10:30
and that we would not give our daughters to the peoples of the land, nor take their daughters for our sons;
Ezra 9:2
For they have taken of their daughters for themselves and for their sons, so that the holy seed have mixed themselves with the peoples of the lands. Indeed, the hand of the officials and leaders has been foremost in this trespass."
Ezra 10:10
Ezra the priest stood up, and said to them, "You have trespassed, and have married foreign women, to increase the guilt of Israel.
2 Corinthians 6:14
Do not be unequally yoked with unbelievers, for what fellowship have righteousness and iniquity? Or what fellowship has light with darkness?

Ammon

Nehemiah 13:1
On that day they read in the book of Moses in the audience of the people; and therein was found written, that an Ammonite and a Moabite should not enter into the assembly of God forever,

General references

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.
Judges 3:6
and they took their daughters to be their wives, and gave their own daughters to their sons and served their gods.