Source: The Great Interpretation of Dreams (Ibn Sirin)
Moldy or spoiled bread in a dream indicates corruption in religion, hardship in livelihood, or unlawful money.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Moldy bread indicates knowledge that is not benefited from or a disobedient child.
Source: Signs in the Science of Expressions (Ibn Shaheen)
Moldy bread is interpreted as worry and miserable living.