Source: The Great Interpretation of Dreams (Ibn Sirin)
Walking on fire in a dream indicates committing sins and major offenses or wading into great strife.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Walking on fire indicates victory over enemies or striving for a dangerous matter.
Source: Signs in the Science of Expressions (Ibn Shaheen)
Walking on fire is interpreted as worry and strife.