כִּ֧י הַתְּרָפִ֣ים דִּבְּרוּ־אָ֗וֶן וְהַקּֽוֹסְמִים֙ חָ֣זוּ שֶׁ֔קֶר וַֽחֲלֹמוֹת֙ הַשָּׁ֣וא יְדַבֵּ֔רוּ הֶ֖בֶל יְנַֽחֵמ֑וּן עַל־כֵּן֙ נָסְע֣וּ כְמוֹ־צֹ֔אן יַעֲנ֖וּ כִּֽי־אֵ֥ין רֹעֶֽה׃ (פ)
For the teraphim have spoken vanity, And the diviners have seen a lie, And the dreams speak falsely, They comfort in vain; Therefore they go their way like sheep, They are afflicted, because there is no shepherd.
Berakhot
When Samuel had a bad dream, he used to say, "The dreams speak falsely" (Zech. x. 2) ; but when he had a good dream, he used to say, "Do the dreams speak falsely? For lo, it is written, 'I [God] do speak with him in a dream' (Num. xii. 6)."