Musannaf Ibn Abi Shayba 17:1283

Abu Bakr narrated to us, he said: Abu Mu'awiyah narrated to us, from al-A'mash, from Ibrahim, from Hammam ibn al-Harith, from Hudhayfah, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "The talebearer (qattat) shall not enter Paradise."