Blood

• Throughout the play, blood is used as a symbol for guilt.
• Before killing Duncan, Macbeth is aware that there will be a lot of blood and uses the euphemism for murder in "bloody business". He's worried the blood will betray him.
• Literal blood is prevalent: the bleeding captain who speaks about Macbeth to Macbeth's bleeding head at the end.
• According to Macbeth "Neptune's ocean" could not wash away the blood (guilt) from his hands. Lady Macbeth sleep walks, unable to clean the blood from hers.
• "I am in blood, stepped in so far, that should I wade no more, returning as I were as tedious as go o'er": Macbeth feels he has done too much and is too guilty to turn back and change his ways.
• "What bloody man is that?" (King 1:2)
• "Make thick my blood; / Stop up the access and passage to remorse" (Lady Macbeth 1:5)
• "And on thy blade, and dudgeon, gouts of blood" (Macbeth 2:1)
• "Will all great Neptune's ocean wash this blood clean from my hand?" (Macbeth 2:2)
• "My hands are of your colour, but I shame to wear a heart so white" (Lady Macbeth 2:2)
• "The spring, the head, the fountain of your blood is stopped, the very source of it stopped" (Macbeth 2:3)
• "Their [guards] hands and faces were all badged with blood" (Lennox 2:3)
• "It will have blood they say: blood will have blood" (Macbeth 3:4)
• "I am in blood stepped in so far, that should I wade no more, returning were as tedious as go o'er" (Macbeth 3:4)
• "Twenty trenched gashes on his [Banquo's] head" (Murderer 3:4)
• "Never shake thy glory locks at me" (Macbeth 3:4)
• "Avaunt! And quit my sight! Let the earth hide thee, thy [Banquo's] bones are marrowless, thy blood is cold" (Macbeth 3:4)
• "Cool it with a baboon's blood" (Weird Sisters 4:1)
• "Bleed, bleed, poor country!" (Macduff 4:3)
• "The blood bolter'd Banquo smiles upon me" (Macbeth 4:1)
• "[Scotland is a] Nation miserable with an untitled tyrant bloody scepter'd" (Macduff 4:3)
• "Out, damned spot: out I say" (Lady Macbeth 5:1)
• "Yet who would have thought the old man to have had so much blood in him?" (Lady Macbeth 5:1)
• "Here's the smell of blood still. All the perfumes of Arabia will not sweeten this little hand" (Lady Macbeth 5:1)
• "Revenges burn in them; for their dear causes / Would to the bleeding and the grim alarm, excite the mortified man" (Menteith 5:2)