Nehemiah 13:1-3

1On that day they read in the book of Moses in the audience of the people; and there was found written in it that the Ammonite and the Moabite should not come into the congregation of 1God for ever;

2because they had not met the children of Israel with bread and with water, and had hired Balaam against them, to curse them; but our 2God turned the curse into blessing.

3And it came to pass, when they heard the law, that they separated from Israel all the mixed multitude.