musi to na Rusi, a w Polsce jak kto chce

Etymology
lit. 'Must – that's in Ruthenia/Rus, and in Poland, it's [one does] as one wants'. Kto chce stressed on the first syllable, keeping the meter of a w Polsce.

Proverb

 * 1)  you can't force one to do what you want, one will do as one pleases (snapped in response to a sentence containing )