سنن أبي داود

Narrated AbuHurayrah:

The Prophet (ﷺ) said: When you hear....(Musa's version has): When a man says people have perished, he is the one who has suffered that fate most.

Abu Dawud said: Malik said: If he says that out of sadness for the decadence of religion which he sees among the people, I do not think there is any harm in that. If he says that out of self-conceit and servility of the people, it is an abominable act which has been prohibited.