John Trapp on Proverbs 20:19

Verſ. 19. He that goeth about as a Tale-bearer] Therefore make not ſuch of thy counſel: For if they can give counſel, yet they can keep none. See the note on chap. 11.13.

Therefore meddle not with him that flattereth] Tale-carriers and flatterers are neither of them fit Counſellors. Theſe will ſay as you ſay, bee it right or wrong; thoſe will tell abroad all that you ſay, and more, too to do you a miſchief. The good Emperour Aurelius was even bought and ſold by ſuch evil Counſellors. And Auguſtus complained when Varus was dead, that hee had none now left, that would deal plainly and faithfully; with him.