"Waiting for a rabbit to run into a tree stump"
The verse is a quotation from "The Five Scorpions" by Han Feizi, a poet from the Warring States period in China.
宋人有耕田者 田中有株
兎走触株 折頸而死
因釋其耒而守株
冀復得兎 兎不可復得
In the Song Dynasty, there was a man who was plowing a field. A rabbit ran up and touched a stump.The rabbit broke its neck, and died. So, the farmer set aside the plow,and watched over the stump.He desired to catch a rabbit again.But he never got a rabbit again.