Nehemiah 13:23

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

Nehemiah 10:30

And that we would not give our daughters unto the people of the land, nor take their daughters for our sons:

Ezra 9:1-2

Now when these things were done, the leaders came to me, saying, The people of Israel, and the priests, and the Levites, have not separated themselves from the people of the lands, in regard to their abominations, even of the Canaanites, the Hittites, the Perizzites, the Jebusites, the Ammonites, the Moabites, the Egyptians, and the Amorites.

Ezra 10:10

And Ezra the priest stood up, and said unto them, You have transgressed, and have taken foreign wives, to increase the trespass of Israel.

Nehemiah 13:1

On that day they read in the book of Moses in the hearing of the people; and in it was found written, that the Ammonite and the Moabite should not come into the congregation of God forever;

1 Samuel 5:1

And the Philistines took the ark of God, and brought it from Ebenezer unto Ashdod.

Ezra 9:11-12

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

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 came to pass, that when Sanballat, and Tobiah, and the Arabians, and the Ammonites, and the Ashdodites, heard that the walls of Jerusalem were being repaired, and that the breaks began to be closed, then they were very angry,

2 Corinthians 6:14

Be you not unequally yoked together with unbelievers: for what fellowship has righteousness with unrighteousness? and what partnership 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 unto the people of the land, nor take their daughters for our sons:
Ezra 9:2
For they have taken of their daughters as wives for themselves, and for their sons: so that the holy race has mixed itself with the people of those lands: yea, the hand of the leaders and rulers has been foremost in this trespass.
Ezra 10:10
And Ezra the priest stood up, and said unto them, You have transgressed, and have taken foreign wives, to increase the trespass of Israel.
2 Corinthians 6:14
Be you not unequally yoked together with unbelievers: for what fellowship has righteousness with unrighteousness? and what partnership has light with darkness?

Ammon

Nehemiah 13:1
On that day they read in the book of Moses in the hearing of the people; and in it was found written, that the Ammonite and the Moabite should not come into the congregation of God forever;

General references

Exodus 34:16
And you take of their daughters unto your sons, and their daughters go play the harlot after their gods, and make your sons go play the harlot after their gods.
Deuteronomy 7:3
Neither shall you make marriages with them; your daughter you shall not give unto his son, nor his daughter shall you take unto your son.
Judges 3:6
And they took their daughters to be their wives, and gave their daughters to their sons, and served their gods.