سنن النسائي

It was narrated that Abu Dharr said: "The Messenger of Allah (ﷺ) said: "There are three to whom of Allah will not speak on the Day of Resurrection or look at them or purify them, and theirs will be a painful torment: the one who reminds people of what he has given them, the one who lets his garment hang beneath his ankles, and a vendor who tries to sell his product by means of false oaths."