Deuteronomy 23:3

No Ammonite or Moabite or any of their people to the tenth generation may come into the meeting of the Lord's people:

Nehemiah 13:1-2

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;

Ruth 4:6

And the near relation said, I am not able to do the relation's part, for fear of damaging the heritage I have: you may do it in my place, for I am not able to do it myself.

Ruth 4:10-22

And, further, I have taken Ruth, the Moabitess, who was the wife of Mahlon, to be my wife, to keep the name of the dead man living in his heritage, so that his name may not be cut off from among his countrymen, and from the memory of his town: you are witnesses this day.

Nehemiah 4:3

Now Tobiah the Ammonite was by him, and he said, Such is their building that if a fox goes up it, their stone wall will be broken down.

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;

Nehemiah 13:23

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

Isaiah 56:3

And let not the man from a strange country, who has been joined to the Lord, say, The Lord will certainly put a division between me and his people: and let not the unsexed man say, See, I am a dry tree.

Treasury of Scripture Knowledge

Summary

An Ammonite or Moabite shall not enter into the congregation of the LORD; even to their tenth generation shall they not enter into the congregation of the LORD for ever:

Bible References

Ammonite

Nehemiah 4:3
Now Tobiah the Ammonite was by him, and he said, Such is their building that if a fox goes up it, their stone wall will be broken down.
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;
Isaiah 56:3
And let not the man from a strange country, who has been joined to the Lord, say, The Lord will certainly put a division between me and his people: and let not the unsexed man say, See, I am a dry tree.

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