Source: The Great Interpretation of Dreams (Ibn Sirin)
Bowing in a dream indicates repentance and submission to God Almighty. Bowing to other than God indicates not fulfilling needs and humiliation.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
Bowing indicates long life and achieving goals. Whoever sees himself bowing will achieve what he wishes.
Source: Signs in the Science of Expressions (Ibn Shaheen)
Bowing is interpreted as goodness and blessing. Whoever sees himself bowing will attain goodness.