Cast pearls before swine

The phrase "cast pearls before swine" is a proverbial expression that means to present or offer something valuable, precious, or of high quality to someone who does not appreciate or recognize its worth. It suggests wasting or squandering something valuable on someone who is incapable of understanding its value or is uninterested in it. The phrase originated from the biblical text of Matthew 7:6, which states, "Do not give what is holy to dogs, and do not throw your pearls before swine, or they will trample them under their feet, and turn and tear you to pieces."