Zhaozhou's Wash Your Bowls (GG7)

KOAN:

A student asked Zhaozhou, “I have just entered this monastery. I beg you, Teacher, please give me instructions.”
Zhaozhou asked, “Have you eaten your rice gruel yet?”
The student answered, “Yes, I have.”
Zhaozhou said, “Then go wash your bowls.”

—Gateless Gate Case 7