5. See Margin, Hebrew, "deep of lip, and heavy of tongue," that is, men speaking an obscure and unintelligible tongue. Even they would have listened to the prophet; but the Jews, though addressed in their own tongue, will not hear him.

     6. many people—It would have increased the difficulty had he been sent, not merely to one, but to "many people" differing in tongues, so that the missionary would have needed to acquire a new tongue for addressing each. The after mission of the apostles to many peoples, and the gift of tongues for that end, are foreshadowed (compare 1Co 14:21 with Isa 28:11).