The Pen
Scholars have said that seeing a pen may indicate acquiring knowledge relevant to what the dreamer was writing. It has also been said that it could signify entering into guardianship or sponsorship, and it might symbolize the return of an absent person.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam
Note: These are traditional scholarly interpretations (ijtihad) drawn from a specific classical source — not a binding religious ruling, fortune-telling, or a prediction of the future.