Who said speak to me extorted treasure in hamlet?

In Shakespeare's play "Hamlet," the line "Speak to me; if there be no good to you, / Yet that I may hear by the end of it" is spoken by the ghost of King Hamlet. This occurs in Act 1, Scene 5, when the ghost reveals the truth about his death and urges Prince Hamlet to seek revenge against King Claudius. The ghost's Words highlight themes of betrayal and the quest for truth in the play.