Mencius and Li Lou talked about education, but he didn't seem to mean what you said. The following is the original text, please compare it and see if it is what you are looking for:

Sun Chou said, "If a gentleman doesn't teach his son, why not?"

Mencius said: "Impossible. The teacher must be right and wrong, followed by anger; If you continue to be angry, you will be defeated. The master taught me to be correct; Master is not out of benevolence and righteousness! Also a father and son. If father and son are estranged, it is evil. The ancients reformed and taught them. Father and son don't complain. If they blame kindness, they will leave. If they leave, it will be a bad omen. Sun Chou said, "What's the point of a gentleman not teaching his son?" ? "

Mencius said: "Impossible. The teacher must be right and wrong, followed by anger; If you continue to be angry, you will be defeated. The master taught me to be correct; Master is not out of benevolence and righteousness! Also a father and son. If father and son are estranged, it is evil. The ancients reformed and taught them. Father and son don't complain. If they blame kindness, they will leave. If they leave, it will be a bad omen. "