Islamic Interpretation of Dreams (Ibn-i Sirin):

In a dream, soap represents the washing away of one’s sins, dispelling distress and adversities, or paying one’s debts.

Seeing a soap boiler inside one’s house in a dream represents a visit by the undertaker.

A bar of soap in a dream also represents a funny person. Washing a shirt with soap in a dream means recovering from an illness, or repenting from sin.

A bar of soap in a dream also means hearing a story, writing a story, bringing a deposition before ajudge, or it could simply mean washing one’s dirt.