Musnad Ahmad 937:254

Waki' narrated to us, al-Mas'udi narrated to us, from 'Ali ibn Mudrik, from Kharashah ibn al-Hurr, from Abu Dharr, who said: And al-A'mash narrated to us, from a man, from Kharashah, from Abu Dharr, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Three [types of people] Allah will not speak to, nor will He look at them on the Day of Resurrection, nor will He purify them, and they shall have a painful punishment: the one who lets his garment trail [below the ankles], the one who reminds others of his favors, and the one who sells his merchandise by means of a false oath."