Beth war, and taketh kep what that ye seye:
Ne telleth nevere no man in youre lyf
How that another man hath dight his wyf;
He wol yow haten mortally, certeyn.
– Geoffrey Chaucer
The Canterbury Tales, The Manciple’s Tale. The Manciple tells his fellow pilgrims to beware of what they say, and never to tell a man that another man has had sex with his wife, because he will hate the messenger.