Source: The Great Interpretation of Dreams (Ibn Sirin)
A sickle in a dream indicates death, war, or harvest. If in its season, it is good; if out of season, it is evil.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
A sickle indicates a man decisive in matters. It may indicate a child.
Source: Signs in the Science of Expressions (Ibn Shaheen)
A sickle is interpreted as good if during harvest time, and as evil if out of season.