uderz w stół, a nożyce się odezwą

Etymology
lit. 'hit [the] table and [the] scissors will speak up'. Originates from tables with drawers used by tailors. Hitting the table would cause the scissors to make a sound even if they were put away in the drawers, thereby making it easy to locate them.

Proverb

 * 1)  a hit dog will holler