The saddest of the "That is what people say" statements

This is the saddest "It's like what people say" I've seen in the gemara:

אמר רב פפא היינו דאמרי אינשי חברך מית אשר איתעשר לא תאשר

Said Rav Pappa: It's like what people say, "If [they say] your friend is dead, believe it. If [they say] your friend is rich, don't believe it.