Either by banishment; or rather, by excommunication from the church, and people, and house, and public worship of God.
Related Commentaries of Ezra 10:8
Ezra 10:8
8 And that whosoever would not come within three days, according to the counsel of the princes and the elders, all his substance should be forfeited,b and himself separated from the congregation of those that had been carried away.