Proverbs 21:6

The getting of treasures by a lying tongue is a vanity tossed to and fro of them that seek death.

The getting of treasures by a lying tongue (by false witness, or by misrepresentation in bargaining) (is) a vanity tossed to and fro of them that seek death - is as a vapour tossed to and fro by the wind; and it is the act "of them that" eventually, though unconsciously, 'are seeking death' eternal. The Hebrew for "vanity" ( hebel (H1892)) means vapour (cf. Psalms 68:2). Those that seek treasures by lying are all the time virtually seeking death (Proverbs 11:27, end).