Source: The Great Interpretation of Dreams (Ibn Sirin)
A pin in a dream is worry and grief. It may indicate a servant or a male child.
Source: Perfuming Humanity in the Expression of Dreams (Al-Nabulsi)
A pin indicates a slandering man. Being pricked by it indicates harm from an enemy.
Source: Signs in the Science of Expressions (Ibn Shaheen)
A pin is interpreted as worry. Whoever sees himself being struck by it will be afflicted with worry.