Washing an Unknown Corpse
Scholars have said that if someone sees themselves washing an unknown corpse, it may indicate that they will help purify a religiously corrupt man, and this man will repent through them.
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.