#What did some enemies of Judah and Benjamin hear that the people who had been exiled were doing?

Some enemies of Judah and Benjamin heard that the people who had been exiled were now building a temple for Yahweh, the God of Israel. [4:1]

For how long did the enemies say they had sacrificed to Yahweh?

The enemies said they had sacrificed to Yahweh since the days when they were brought to that place.