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 hungry person cannot be expected to work, perform, or cooperate properly)
köken: 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.
Първо дай на работниците да обядват, после искай да продължат — гладна мечка хоро не играе.
Ако искаш хората да работят качествено, осигури им нормални условия — гладна мечка хоро не играе.