Deuteronomy 23:3

An Ammonite or a Moabite shall not enter into the assembly of Yahweh; even to the tenth generation shall none belonging to them enter into the assembly of Yahweh forever:

Nehemiah 13:1-2

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,

Ruth 4:6

The near kinsman said, "I can't redeem it for myself, lest I mar my own inheritance. Take my right of redemption for yourself; for I can't redeem it."

Ruth 4:10-22

Moreover Ruth the Moabitess, the wife of Mahlon, I have purchased to be my wife, to raise up the name of the dead on his inheritance, that the name of the dead not be cut off from among his brothers, and from the gate of his place. You are witnesses this day."

Nehemiah 4:3

Now Tobiah the Ammonite was by him, and he said, "What they are building, if a fox climbed up it, he would break down their stone wall."

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 stopped, then they were very angry;

Nehemiah 13:23

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

Isaiah 56:3

Neither let the foreigner, who has joined himself to Yahweh, speak, saying, "Yahweh will surely separate me from his people;" neither let the eunuch say, "Behold, 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, "What they are building, if a fox climbed up it, he would break down their stone wall."
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,
Isaiah 56:3
Neither let the foreigner, who has joined himself to Yahweh, speak, saying, "Yahweh will surely separate me from his people;" neither let the eunuch say, "Behold, I am a dry tree."