12. not hear—because their prayers are hypocritical: their hearts are still idolatrous. God never refuses to hear real prayer (Jer 7:21, 22; Pr 1:28; Isa 1:15; 58:3).
sword … famine … pestilence—the three sorest judgments at once; any one of which would be enough for their ruin (2Sa 24:12, 13).