Do not criticize others if you are not prepared to be criticized in return

(informal) To not know; to have no idea.

Bad parents do not reproduce good children

It is better to be contented over something than to have nothing at all.

Synonym of the apple does not fall far from the tree

(medicine, imperative) It is best not to be gluttonous; eating shouldn't be one's favorite activity, but one should eat only to supply health.

(law) To officially give a legal notice to. / To warn or announce. / (idiomatic) To fire; to terminate one's employment or formal association.

have a very poor aim, such as while using firearms or in sports.

plural of nothing-buttery

In diplomacy, an unsigned memorandum calling attention to a neglected, though perhaps not urgent, matter.