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.
In the hadith transmitted by Yahya b. Sa'id on the authority of Qatada (the words are)
(The believing servant) finds relief from the troubles of the world and its hardships and (gets into) the Mercy of Allah.