`A’isha said: A man asked permission to see the Prophet (peace be upon him), and he said: He is a bad son of the tribe, or: He is a bad member of the tribe. He then said: Give him permission. Then when he entered, he spoke to him leniently. `A’isha asked: Apostle of Allah! You spoke to him leniently while you said about him what you said! He replied: The one who will have the worst position in Allah’s estimation on the Day of Resurrection will be the one whom people left alone for fear of his ribaldry.
Sunan Abi Dawud, Book 43, Hadith 19