Nehemiah 13:27

On that day they read in the book of Moses in the audience of the people; and therein was found written, that the Ammonite and the Moabite should not come into the congregation of God for ever;

Because they met not the children of Israel with bread and with water, but hired Balaam against them, that he should curse them: howbeit our God turned the curse into a blessing.

Now it came to pass, when they had heard the law, that they separated from Israel all the mixed multitude.

And before this, Eliashib the priest, having the oversight of the chamber of the house of our God, was allied unto Tobiah: