From Sahih Muslim (Hadith 2202):
Qatada b. Rib'i reported Allah's Messenger (ﷺ) as saying:Whenever a bier passed before him, he said: He is the one to find relief and the one with (the departure of him) other will find relief. They said: Apostle of Allah, who is al-Mustarih and al-Mustarah? Upon this he said: The believing servant finds relief from the troubles of the world, and in the death of a wicked person, the people, towns, trees and animals find rellef
Reference: Muslim 2202