…If a sick person sees himself drinking wine in a dream, it means that he will receive the right medicine and recover from his illness. Drinking wine in a dream also means losing one’s senses, or it could denote an evil happening. Drinking wine in the company of mentally disturbed people along with sedatives, drugs, music, dancing, farce, or ridiculous actions in a dream means that one will brake his pledge of allegiance to his guardian or ruler, deny his covenant to his Lord, or that he may start a war against his ruler. If a scholar sees himself drinking wine in a dream, it means that his knowledge will grow. If it is grape wine in the dream, it means that he will eat grapes outside of their season, or that he may require a drug preparation as a cure for an ailment, or it could mean earning lawful…

(See Juice)

Just as wine, it symbolizes richness and knowledge. The grape is a symbol of fertility and sacrifice.