Abu Dawud Book 27, Hadith Number 4076.
Chapter : Hanging down the lower garment below the ankles.
Narated By N/A : Abu Dharr reported the Prophet (may peace be upon him) as saying : There are three to whom Allah will not speak and at whom He will not look on the Day of Resurrection, and whom He will not declare pure, and they will have a painful punish-ment. I asked: Who arc they, Apostle of Allah, they are losers and disappointed? He repeated it three times. I asked : Who are they, Apostle of Allah, they are losers and disappointed? He replied: The one who wears a trailing robe, the one who takes account of what he gives, and the one who produces a ready sale of a commodity by false swearing.