Nehemiah 13:3

So it was, when they had heard the Law, that they separated all the mixed multitude from Israel.

Surrounding context

13:2 because they had not met the children of Israel with bread and water, but hired Balaam against them to curse them. However, our God turned the curse into a blessing.

13:3 So it was, when they had heard the Law, that they separated all the mixed multitude from Israel.

13:4 Now before this, Eliashib the priest, having authority over the storerooms of the house of our God, was allied with Tobiah.

Translation and sources