זוהר בראשית — דף קצב ע”א

Joseph gazed at his father’s image in the spirit of wisdom; so when the cupbearer said “behold, a vine was before me” and “in the vine were three branches,” his spirit was awakened. He read it as joyful news: the vine is the Assembly of Israel, the three branches are priests, Levites and Israelites, and the grapes are the righteous. The Zohar discusses white and black grapes in dreams, and the grapes tied to the sin of Adam, Noah and the sons of Aaron. In the baker’s dream, which opens with “also,” Joseph perceived bad news: the three baskets signify the destruction of the Temple and Israel’s exile, and the bird that eats refers, according to the text, to peoples who gather against Israel. The text contrasts the supernal level, the shining moon, with the evil serpent.