Musnad Ahmad 937:30

'Affan narrated to us, Shu'bah narrated to us, he said: 'Ali ibn Mudrik informed me, he said: I heard Abu Zur'ah narrating from Kharashah ibn al-Hurr, from Abu Dharr, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "There are three whom 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." He said: I said: "O Messenger of Allah, who are they? They have lost and failed." He said: The Messenger of Allah (peace and blessings of Allah be upon him) repeated it three times. He said: "The one who lets his garment hang below his ankles (al-musbil), the one who sells his merchandise by means of false or wicked swearing, and the one who reminds others of his charity (al-mannan)."