Muhammad bin Rafa'i محمد بن رافع · The Book of Zakah

"No Sadaqah is due on less than five Awsuq,

"The Messenger of Allah 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."