Musnad Ahmad 30:1428

'Affan narrated to us, Hammam narrated to us, Farqad narrated to us, from Yazid, the brother of Mutarrif, from Abu Hurairah, from the Prophet (peace and blessings of Allah be upon him), that he said: "Indeed, the most lying—or indeed, among the most lying—of people are the dyers and the goldsmiths." And 'Affan said once: "Among the most lying."