Hold, take my sword. There’s husbandry in heaven;Their candles are all out. Take thee that too.A heavy summons lies like lead upon me,And yet I would not sleep. Merciful powers,Restrain in me the cursèd thoughts that natureGives way to in repose.
Banquo says that although he is burdened and weary with sleep, he is unable to do so because of the nightmares that disturb his rest.