What is the next sentence of Roubaozi’s utterance after beating the dog?

A meat bun beats a dog - there is no return.

This catchphrase refers to throwing things away without return. "A meat bun beats a dog" is a metaphor for a heartless person. Steamed buns stuffed with meat are used as weapons to fight dogs. Even if the dog is hit, it won't cause much pain, and it will get a delicious meat bun.

Source: Lao She's "Camel Xiangzi" 9: "You can do better! Meat buns beat dogs, and you will never look back once you leave!"

Extended information:

Joke Quote

A: There is a very ferocious dog in our village. If anyone beats it, it will bite anyone with all its strength. But when my son hit it, it not only didn't bite my son, but also behaved very docilely.

B: It’s really strange. I want to know how your son beat that dog?

A: Get the meat buns!