Nehemiah 13:23

And in those days I saw the Jews who were married to women of Ashdod and Ammon and Moab:

Nehemiah 10:30

And that we would not give our daughters to the peoples of the lands, or take their daughters for our sons;

Ezra 9:1-2

Now after these things were done, the captains came to me and said, The people of Israel and the priests and Levites have not kept themselves separate from the people of the lands, but have taken part in the disgusting ways 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 got to his feet and said to them, You have done wrong and taken strange women for your wives, so increasing the sin of Israel.

Nehemiah 13:1

On that day there was a reading from the book of Moses in the hearing of the people; and they saw that it said in the book that no Ammonite or Moabite might ever come into the meeting of God;

1 Samuel 5:1

Now the Philistines, having taken the ark of God, took it with them from Eben-ezer to Ashdod.

Ezra 9:11-12

Which you gave to your servants the prophets, saying, The land into which you are going, to take it for a heritage, is an unclean land, because of the evil lives of the peoples of the land and their disgusting ways, which have made the land unclean from end to end.

Ezra 10:44

All these had taken strange wives; and some of them had wives by whom they had offspring.

Nehemiah 4:7

But when it came to the ears of Sanballat and Tobiah and the Arabians and the Ammonites and the Ashdodites, that the building of the walls of Jerusalem was going forward and the broken places were being made good, they were full of wrath;

2 Corinthians 6:14

Do not keep company with those who have not faith: for what is there in common between righteousness and evil, or between light and dark?

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 lands, or take their daughters for our sons;
Ezra 9:2
For they have taken their daughters for themselves and for their sons, so that the holy seed has been mixed with the peoples of the lands; and in fact the captains and rulers have been the first to do this evil.
Ezra 10:10
And Ezra the priest got to his feet and said to them, You have done wrong and taken strange women for your wives, so increasing the sin of Israel.
2 Corinthians 6:14
Do not keep company with those who have not faith: for what is there in common between righteousness and evil, or between light and dark?

Ammon

Nehemiah 13:1
On that day there was a reading from the book of Moses in the hearing of the people; and they saw that it said in the book that no Ammonite or Moabite might ever come into the meeting of God;

General references

Exodus 34:16
Or take their daughters for your sons; for when their daughters give worship before their gods, they will make your sons take part with them.
Deuteronomy 7:3
Do not take wives or husbands from among them; do not give your daughters to their sons, or take their daughters for your sons.
Judges 3:6
And they took as wives the daughters of these nations and gave their daughters to their sons, and became servants to their gods.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain