As Macbeth leaves the hall, Lady Macbeth enters, remarking on her boldness. She imagines that Macbeth is killing the king even as she speaks. Hearing Macbeth cry out, she worries that the chamberlains have awakened. She says that she cannot understand how Macbeth could fail, she had prepared the daggers for the chamberlains herself. She asserts that she would have killed the king herself then and there. Macbeth emerges, his hands covered in blood, and says that the deed is done. Badly shaken, he remarks that he heard the chamberlains awake and say their prayers before going back to sleep. When they said “amen,” he tried to say it with them but found that the word stuck in his throat. He adds that as he killed the king, he thought he heard a voice cry out: “Sleep no more, Macbeth does murder sleep”