The story goes that there was once a scholar in Edo Japan who, on hearing that his mother was sick, hurriedly bought medicine and traveled more than three hours through the snow to give it to her at home.
日本江戶初期，赴外地求學的中江藤樹，聽說母親病了，趕緊買了藥，在雪地裡走了三個多小時，送回家給母親。