Source: The Great Interpretation of Dreams (Ibn Sirin)
Drinking salty seawater in a dream indicates gaining wealth from a ruler with worry and fatigue.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Drinking seawater indicates vast knowledge or abundant wealth.
Source: Signs in the Science of Expressions (Ibn Shaheen)
Drinking seawater is interpreted as gaining wealth from the king.