Abu Bakr bin Abu Zuhair Thaqafi narrates from his father: I heard the Prophet Muhammad (peace be upon him) at the place of Nibah or Nibawah, which is related to Taif, saying during a sermon: "Soon you will recognize the people of Paradise in comparison to the people of Hell (the narrator is unsure, perhaps these are the words:) you will recognize the better people in comparison to the worse people."
(The narrator says) To my knowledge, the Prophet Muhammad (peace be upon him) said: "You will recognize the people of Paradise in comparison to the people of Hell." One of the Muslims asked: O Messenger of Allah! By what means? The Prophet Muhammad (peace be upon him) said: Through good praise and bad praise, you are witnesses over one another."