Eating mulberries signifies beneficial and abundant earnings. Black mulberries signify gold, white mulberries silver, and the mulberry tree a person with wealth and children.
Eating red mulberries signifies strong and pure belief, firmness in religion, and bodily health.
Ja'far al-Sadiq says black mulberries signify wealth and benefit, but may also signify a dispute between spouses. Kirmani says eating sweet white mulberries signifies goodness and benefit from a generous and noble person.