Why Jews Have Beards

David delivered condolences to the people of his enemy nation Ammon (located in present day Amman, Jordan,) a Torah prohibition. Hanun, King of Ammon, takes David’s messengers and shaves off a half of each one’s beard, a humiliation.  David orders them to go to the city of Jericho and wait for their beards to grow back.  From this we infer the proper Jewish look of having a beard, as David could have just as easily just ordered them to simply shave off the other half.  I’d have one too, if mine didn’t get so very itchy and sore when I try to grow it.