The follower said, "Why don't you read a dress if you are not merciful?" Gong said, "My arm is the property of my family. I can ask anyone for it."

It means:

The man behind him said, "Don't care about your health, but worry about a dress?" The pedant replied: "My arm is my own, which one (unlike clothes) asked me for.

The pedantic man borrowed other people's clothes to go out, fell down, hurt his arms and hands, and got some mud on his clothes. Others helped him massage his arms, but he asked people to fetch water to wash clothes, saying that it was nobody's business to hurt his arms. )