Macduff finds Malcolm at the English court and urges him to attack Macbeth at once. Malcolm suspects that Macduff is Macbeth’s agent sent to lure Malcolm to his destruction in Scotland. After Malcolm tests Macduff and finds him sincere, Malcolm reveals that Edward, king of England, has provided a commander (Siward) and ten thousand troops for the invasion of Scotland. Ross then arrives with the news of the slaughter of Macduff’s entire household. At first grief-stricken, Macduff follows Malcolm’s advice and converts his grief into a desire to avenge himself on Macbeth.