Henry IV, Part I
Henry IV, Part I was a  written by William Shakespeare, the second part of a tetralogy that includes Richard II, Henry IV, Part II, and Henry V. The play contained the oft-quoted line "The better part of valor is discretion."

In 2270, James T. Kirk referenced the play, explaining that "discretion is the better part of valor" when ordering a retreat from three Romulan vessels. ()

In 2293, General  paraphrased a line from the play, saying "A game's afoot" while his Bird-of-Prey attacked the  over Khitomer. ()

In 2371, Quark described "an old Ferengi saying about discretion being the better part of valor." ()

External links 
 
 

fr:Henry IV
Shakespearean works