Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
Soap in a dream is wealth that removes worry. Washing clothes with soap indicates repentance, payment of debt, and healing from illnesses.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
Soap indicates the removal of worries and troubles. Eating it indicates consuming unlawful money.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
Soap is interpreted as a man who removes people's worries. Whoever sees himself washing with soap is purifying himself from his sins.