…you did wed my sister for her wealth, Then for her wealth’s sake use her with more kindness; Or, if you like elsewhere, do it by stealth; Muffle your false love with some show of blindness; Let not my sister read it in your eye; Be not thy tongue thy own shame’s orator; Look sweet, speak fair, become disloyalty; Apparel vice like virtue’s harbinger; Bear a fair presence though your heart be tainted; Teach sin the carriage of a holy saint; Be secret-false: what need she be acquainted?
There are no more uses of "harbinger" in the play.
Show samples from other sources
The warm summer is a harbinger of things to come.
Make all our trumpets speak; give them all breath, Those clamorous harbingers of blood and death.