It was said that the cohort of brothers from Flower-Fruit Mountain found themselves in a predicament on Mount Meru when Peng Demon King was about to self-destruct. That was when the Demon Teacher Kunpeng arrived.
Kunpeng was the master of Peng Demon King. When his disciple was in trouble, he naturally had to take action. Even though Mount Meru was a den of dragons and tigers, he still had to make a breakthrough.
The Tathagata was confident in his status, and since Kunpeng had long been renowned, if the Tathagata himself were to intervene and lose to Kunpeng, it would be a considerable loss of face. How could he then continue to be the Respectful Ruler of the World? People would look at him and say, "Oh, the Tathagata, he was defeated by Kunpeng." Just as now with the Jade Emperor, when people mention him, they say, "Oh, the Jade Emperor, who was beaten by a monkey."
He is the Lord of Ten Thousand Heavens, the Great Heavenly Master!
He was beaten by a monkey.