Musannaf Ibn Abi Shayba 17:1379

Yunus ibn Muhammad narrated to us, he said: 'Abd al-Wahid ibn Ziyad narrated to us, he said: 'Asim ibn Kulayb narrated to us, from his father, from Abu Hurayrah, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Every sermon (khutbah) that does not contain the Tashahhud is like a hand affected by leprosy (judhama)."