It wasnarrated that Abu Hurairah said:
"A funeral passed by theProphet(ﷺ) and they praised (the deceased) and spoke well of himandmentioned his good characteristics. He said: '(Paradise is)guaranteed for him.' Then another funeral passed by and they spokebadly of him and mentioned his bad characteristics, and he (theProphet (ﷺ)) said: '(Hell is) guaranteed for him. You are thewitnesses of Allah on earth.'" (FR)
English reference (FR): Vol. 1, Book 6, Hadith 1492 (FR)
Arabic reference (FR): Book 6, Hadith 1559 (FR)