Vesi vanhin voitehista.
--
Traditional Finnish proverb
The literal reading of voide would be more like "ointment",
but that sounds too weird in English. Just the same, it does
clarify the idea: the best first aid for many wounds is
simply disinfection with plenty of water.
In modern times, this is most often used to refer to the first line
of defense against the dreaded hangover...