Source: The Great Interpretation of Dreams (Ibn Sirin)
Betrayal in a dream indicates poverty and humiliation. Betrayal of a trust indicates corruption in religion.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Betrayal indicates adultery or theft. Whoever sees himself betraying is committing a sin.
Source: Signs in the Science of Expressions (Ibn Shaheen)
Betrayal is interpreted as worry. Whoever sees himself betraying will be afflicted with worry.