Source: The Great Interpretation of Dreams (Ibn Sirin)
Failure in a dream indicates failure, disappointment, and difficulty in affairs.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Failure indicates falling into hardship and worry. It indicates loss.
Source: Signs in the Science of Expressions (Ibn Shaheen)
Failure is interpreted as worry. Whoever sees himself failing will be afflicted with worry.