an army marches on its stomach; functioning well requires the fulfillment of basic needs
köken: Literally, “without food and drink, the hero will not function”. First attested in print in Jens Christian Edvard Theodor Mau's 1879 Dansk ordsprogsskat. A similar sentence was first written by Johan Herman Wessel in 1772 as "Uden Øl og Mad er Helten ingen Ting" (Literally, “Without beer and food, the hero is nothing”). Changed to make the phrase rhyme.
an army marches on its stomach, a person must eat properly in order to perform tasks well
köken: Literally, “food is the workhorse”.
Etimoloji
Literally “a hungry bear does not dance the horo”, referring to the idea that one cannot expect work, performance, or cooperation from someone whose basic needs are unmet.