Jugenderziehung
From LSJ
οὐκ ἂν λάβοις παρὰ τοῦ μὴ ἔχοντος → you can't take from one who doesn't have, you can't squeeze blood out of a turnip, you can't get blood out of a turnip, you can't get blood from a stone, you can't get blood out of a stone
German > Latin
Jugenderziehung, educatio puerilis. – disciplina puerilis (als Zucht). – eine gute I. genossen haben, institutum esse liberaliter educatione doctrināque puerili: liberaliter educatum esse a primis pueritiae rudimentis.