Knocking on a Door
Scholars have said that whoever sees themselves knocking on a door in a dream, their prayer may be answered, based on the saying: 'Whoever insists on knocking on a door is likely to have it opened for them.' This may also indicate success in a matter the dreamer is seeking. If the door is knocked upon and opened, then the prayer is likely to be answered and success achieved.
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.