If thou speak’st false,
Upon the next tree shalt thou hang alive,
Till famine cling thee: if thy speech be sooth,
I care not if thou dost for me as much.
– William Shakespeare
Macbeth, Act 5, Scene 5. Macbeth warns his messenger that if he is lying about the trees of Birnam Wood moving, he will hang him from the next tree. He calls him a “liar and slave.”