"Kto ma brzuch zbyt chudy, temu grają dudy"
"The bagpipe plays for him, who has a scraggy belly" [?]; According to Kubik this proverb contains a lexical ambiguity about playing bagpipes, which in this case defines the sounds coming from the digestive tract of a hungry man.
Kubik, Józef: Przysłowia i wyrażenia przysłowiowe o instrumentach dętych (Proverbs and proverbial expressions about wind instruments). In: Polskie instrumenty ludowe… (1981), p.128 (»Krzyżanowski/Adalberg, I;209).
Słownik warszawski (1), I, p.579 (➺ Duda 6).