The Deceased in a Mosque
Scholars have said that seeing a deceased person in a mosque may indicate their safety from torment in the afterlife, as the mosque is a place of security and worship.
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.