19. Seek unto—Consult in your national difficulties.
them … familiar spirits—necromancers, spirit charmers. So Saul, when he had forsaken God (1Sa 28:7, &c.), consulted the witch of En-dor in his difficulties. These follow in the wake of idolatry, which prevailed under Ahaz (2Ki 16:3, 4, 10). He copied the soothsaying as he did the idolatrous "altar" of Damascus (compare Le 20:6, which forbids it, Isa 19:3).
wizards—men claiming supernatural knowledge; from the old English, "to wit," that is, know.
peep—rather "chirp faintly," as young birds do; this sound was generally ascribed to departed spirits; by ventriloquism the soothsayers caused a low sound to proceed as from a grave, or dead person. Hence the Septuagint renders the Hebrew for "necromancers" here "ventriloquists" (compare Isa 29:4).
mutter—moan.
should not, &c.—The answer which Isaiah recommends to be given to those advising to have recourse to necromancers.
for the living, &c.—"should one, for the safety of the living, seek unto (consult) the dead?" [Gesenius]. Lowth renders it, "In place of (consulting) the living, should one consult the dead?"