Sunan At-Tirmidhi

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