Answer:
I believe this part of the passage fits your description. "His host tried to persuade the warrior to stay a few days, but Hidesato insisted on going home, saying that he had now finished what he had come to do, and must return. The Dragon King and his family were all very sorry to have him leave so soon, but since he would go they begged him to accept a few small presents (so they said) in token of their gratitude to him for delivering them forever from their horrible enemy the centipede.
" After defeating the enemy, the brave warrior didn't demand any form payment from the dragon king but humbly accepted their gratitude. It supports the cultural value that one should help others without expecting payment in return.
