墨は餓鬼に磨らせ、筆は鬼に持たせよ（すみはがきにすらせ、ふではおににもたせよ）

Japanese vocabulary

Meaning: grind your inkstick gently but move your brush vigorously; let the hungry ghost grind your inkstick, let the ogre hold your brush

See it used in real works

• Example sentences from Japanese novels & web fiction (Massif)
• Hear “墨は餓鬼に磨らせ、筆は鬼に持たせよ” pronounced in real videos (YouGlish)