Source: The Great Interpretation of Dreams (Ibn Sirin)
Grass in a dream indicates religion and Islam. Green grass indicates righteousness in religion. Dry grass indicates its corruption.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Grass indicates money and sustenance. Eating it indicates wealth for the poor, and illness for the rich.
Source: Signs in the Science of Expressions (Ibn Shaheen)
Grass is interpreted as goodness and blessing. Whoever sees himself gathering it will gather money.