[W]e but teach / Bloody Inſtructions, which, being taught, returne / To plague th' Inuentor. This euen-handed Iuſtice / Commends th' Ingredience of our poyſon'd Challice / To our owne lips.
c. 1606 (date written), William Shakespeare, “The Tragedie of Macbeth”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act I, scene vii], page 135, column 1