what is source of story about healer sent by persian king to aravia and no one paid attention to him?

i wanted to ask "is there a hadith admonishing to not eat until being hungry?" and i have found this question in "similar questions" block. the answer to that question is enough for me. i wanted to quote a text in my question. since i prepared to write my question, translated the text, using google, i make a new question, though i am not very interested to know out answer to it. in book "kitab at-tarbiya" in tatar language, qayum nasiri writes: > TWENTY-FIRST UPBRINGING One of the kings of Gajam sent a skilled > doctor to the service of the Prophet (peace and blessings of Allaah be > upon him). He lived in Arab countries for many years. No one came up > to him, saying, "Heal me." One day he came to the Prophet (peace and > blessings of Allaah be upon him) and complained. "I've been here for > days, and no one has paid attention to me," he said. The Prophet > (peace and blessings of Allaah be upon him) said: “The custom of this > people is that they will not eat anything until they want to eat it, > and they will start to refuse from food before they are full, that is, > they will not eat until they are satiated.” The doctor said, "If > that's the way to heal," then kissed the ground and left. Now, son, > has this story sufficed for your upbringing? Don't eat your stomach > full, you'll be in health, be satisfied with little. the russian version of it says this way: > It is known that one of the Persian kings once sent his best healer to > Arabia to serve the prophet. do you know what is source of this story? i read this book in paper form in past. now, i used https://nsportal.ru/shkola/rodnoy-yazyk-i-literatura/library/2020/02/02/k-nasyyri-trbiya-kitaby where is also russian translation of it.