Proverbs 14:7

“Go from the presence of a foolish man, etc.] A wicked one; avoid him, shun his company, depart from him, have no fellowship with him, it, being dangerous, infectious, and hurtful; when thou perceivest not [in him] the lips of knowledge; when it is observed that his lips pour out foolishness, what is corrupt and unsavoury, unchaste and filthy; what does not minister grace to the hearers, nor is for the use of edifying, nor any ways improving in useful knowledge, but all the reverse: the Targum is, “for there is no knowledge in his lips,” in what is expressed by them; some understand this ironically, and render the words thus, “go right against a foolish man”f391; join in company with him,…”

“Avoid the society of those who cannot teach you.”

“Pro 9:6, Pro 13:20, Pro 19:27; Co1 5:11; Eph 5:11 Proverbs 14:8”

“Three proverbs regarding fools: 7 Go from the presence of a foolish man, And surely thou hast not known lips of knowledge; i.e., surely hast not brought into experience that he possesses lips which express experimental knowledge, or: surely thou must confess on reflection that no prudent word has come forth from his mouth. If 7b were intended to assign a motive, then the expression would be כּי בל־תּדע or וּבל־תּדע ( Isa 44:9), according to which Aquila and Theodotion translate, καὶ οὐ μὴ γνῷς. נגד is the sphere of vision, and מנּגד denotes either away from the sphere of vision, as e.g., Isa 1:16, or, inasmuch as מן is used as in מעל, מתּחת, and the like: at a certain distance from the…”