Proverbs 13:11

by vanity i.e. by untrustworthy methods, such as speculation, gambling, high rate of interest with poor security (comp. Proverbs 21:6), in contrast to hard work, by labour(lit. with the hand). The word vanity in this sense of what is unreliable and transitory is a key-word of the Book of Ecclesiastes.

The LXX. and Vulg. render in haste, quick returns, ἐπισπουδαζομένη (with the addition μετὰ ἀνομίας), festinata.