What did the enemies of Judah and Benjamin first offer Zerubbabel?

Answer: To help build the temple

They said, "Let us build with you," but Zerubbabel and Jeshua refused, saying they alone would build as Cyrus commanded.

“When the enemies of Judah and Benjamin heard that the exiles were building a temple for the LORD, the God of Israel,”— Ezra 4:1 (BSB)