Hammam bin Al-Harith said: "Aman passed by Hudhaifah bin Al-Yaman and it was said to him: "This person conveys news about the people to the leaders.' So Hudaifah said: “The Messenger of Allah said: “The Qatat shall not enter paradise.'" (Sahih)Sufyan said: "The Qatat is the Nammam””
SahihSahihHasan SahihBook 27 · Hadith 132