Sauron the Deceiver advising Ar-Pharazon the Golden, king of Númenor. The king's got a sort of Aragornish thing going, which is on purpose; they are distant relatives and all.
From Tolkien's Akallabêth (the last bit of the Silmarillion), and it's awesomely awesome because of Sauron being a sneaky fucker. He's good at that.
Title is from Hamlet, where the elder Hamlet speaks of his murder:
Upon my secure hour thy uncle stole,
With juice of cursed hebenon in a vial,
And in the porches of my ears did pour
The leperous distilment