Who does the ghost exempt from his call of revenge in hamlet?

In Shakespeare's "Hamlet," the ghost of King Hamlet exempts Queen Gertrude, Hamlet's mother, from his call for revenge against Claudius. The ghost instructs Hamlet to leave her judgment to heaven, indicating that he does not wish for Hamlet to harm her, despite her hasty remarriage to Claudius. This distinction highlights the complexity of Gertrude's character and her role in the unfolding tragedy.