|wrong side out or up; anti-||feed|
|simp. and trad.
Originally referred to a raven that would provide food to its mother after becoming an adult. Emperor Wu of Liang [6th century]:
- 靈蛇銜珠以酬德，慈烏反哺以報親，在蟲鳥其尚爾，況三才之令人。 [MSC, trad.]
- Língshé xián zhū yǐ chóudé, cíwū fǎnbǔ yǐ bàoqīn, zài chóngniǎo qí shàng ěr, kuàng sāncái zhī lìngrén. [Pinyin]
- The mystic snake holds a pearl in its mouth to show gratitude; the raven feeds its parents to repay their kindness. It's as such even in lower animals and birds, let alone the virtuous men.
灵蛇衔珠以酬德，慈乌反哺以报亲，在虫鸟其尚尔，况三才之令人。 [MSC, simp.]
- to take care of one's parents when they are old; to show filial piety
- to give back to a person or institution which has contributed to one's own growth