Definition of 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)

すみがきふでおに

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

sumihagakinisurasefudehaoninimotaseyo

expression
grind your inkstick gently but move your brush vigorously, let the hungry ghost grind your inkstick, let the ogre hold your brush(proverb)
Other readings:
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】
Related Kanji
black ink, India ink, ink stick, Mexico
starve, hungry, thirst
ghost, devil
grind, polish, scour, improve, brush (teeth)
writing brush, writing, painting brush, handwriting
hold, have