What does 2 Samuel 13:28 mean?

Absalom told his men, 'Watch Amnon closely. When he’s drunk and I give the signal, kill him. Don’t be afraid—I’m the one giving the order. Be strong and do it.' 2 Samuel 13:28 - Modern Text Bible

(Absalom reveals his plan for revenge, instructing his men to kill Amnon when he’s vulnerable.)