Original: At the king's palace, Idomeneo seeks counsel from Arbace, who says another victim could be sacrificed if Idamante were sent into exile.
Simplified: At the king's palace, Idomeneo asks Arbace what he should do, because he has disobeyed the god. Arbace says that Neptune would be happy if another victim could be sacrificed so long as Idamante is sent into exile (to another country).