Source: The Great Interpretation of Dreams (Ibn Sirin)
The slave in a dream indicates an owned man. Whoever sees himself becoming a slave falls into hardship. Whoever sees himself freeing a slave, God will relieve his worry.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
The slave indicates worry and humiliation. Buying one indicates buying worry. Selling one indicates the disappearance of worry.
Source: Signs in the Science of Expressions (Ibn Shaheen)
The slave is interpreted as worry. Whoever sees himself as a slave will be afflicted with worry.