Buddha while in sojourn in Zatawun Monastery once gave a sermon on account of Dummedha Jataka in the service of the interests of humankind.

Long ago, while King Byamadat was in reign at Bayanathi, embryo-Buddha took conception in the womb of the queen. When he was born, he was named Byamadat. When he became 16 he had mastered the Three Jewels of Prediction and had also mastered the techniques of 18 kinds of arts.

At the time the people of Bayanathi propitiated the nats, killing many chicken, pigs and goats as sacrifices. When the embryo-Buddha saw it he was repentant that many people had been committing the sins. So he thought of putting a stop to it when he became king.

One day the embryo-Buddha was on tour in town when he saw many people assembled at great banyan tree. He enquired and found out that they were praying for sons, daughter, and riches. So he got out of the carriage and joined the crowd, going to the banyan tree, offering flowers and going round it like those who propitiated the nats.

Since then he did so quite often like nat worshippers. When the king died he became king. He ruled with abstinence of four sins and adherence to ten ways of good kings. He also planned to stop nat worship. So he assembled the ministers, ponnas, and rich man in the city and asked if they realized he had become. They had not. He said he had become so as he had joined them in praying at the banyan tree and he had promised he would give a charity if he became king. So he asked them to prepare for it. They said they did not know how. The king replied that he had promised to offer flesh and blood of those who killed, those who stole, and those who committed the five cardinal sins and so he asked that it be declared all over Bayanathi.

The ministers did so with a town crier and gongs. Since then the people observed abstinence from the five cardinal sins. The embryo-Buddha too did good deeds. So they passed into appropriate lives upon death.

Thus the Buddha served the interests of mankind not just now but even before that. The Buddha's disciples at that time were those of Bayanathi then.