Source: The Great Interpretation of Dreams (Ibn Sirin)
Numbers in a dream may indicate the number of years, money, or children. Each number has its own significance derived from the Quran, Sunnah, or custom.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Numbers indicate calculated and destined matters. They may indicate victory or loss depending on the number.
Source: Signs in the Science of Expressions (Ibn Shaheen)
Numbers are interpreted according to their meaning. One indicates God, two indicates partnership, and so on.