Musnad Abu Ya'la al-Mawsili 152:39

Muhammad ibn Abi Bakr narrated to us, Abd al-Aziz narrated to us, Mansur narrated to us, from Abu al-Duha, from Masruq, from Abdullah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Indeed, the people who will receive the severest punishment on the Day of Resurrection are the image-makers."