tokens - prognostics; the pretended miracles which they gave as proofs of their supernatural powers.
liars - (Jer 50:36). Conjurers; or, astrologers; men leading a retired contemplative life in order to study divination by the signs of the stars [Vitringa].
backward - with shame at their predictions not being verified. “To turn away the face” is to frustrate defeat (Isa 36:9; 1Ki 2:15). The “wise men” are the diviners who, when Babylon was attacked by Cyrus, predicted his overthrow.