ce se naște din pisică, șoareci mănâncă

Etymology
lit. 'whatever is born out of cat, it is mice that it eats'. Attested for the first time, in a slightly different form, as the subtitle of 's 1862 novel : "Ce naște din pisică șoareci mănâncă".

Proverb

 * 1) the apple does not fall far from the tree, like father, like son, like mother, like daughter