On one occasion the venerable Udena was living at Benares in the Khemiya Mango Grove. Now on that occasion the brahmin Ghotamukha had arrived in Benares for some business or other. As he was walking and wandering for exercise, he came to the Khemiya Mango Grove. At the time the venerable Udena was walking up and down in the open. Then the brahmin Ghotamukha went up to the venerable Udena and exchanged greetings with him. When this courteous and amiable talk was finished, still walking up and down with the venerable Udena, he said this: "Worthy recluse, there is no wanderers' life that accords with the Dhamma: so it seems to me here, and that may be because I have not seen such venerable ones as yourself or because I have not seen the Dhamma here."
When this was said, the venerable Udena stepped down from the walk and went into his dwelling, where he sat down on a seat made ready.And Ghotamukha too stepped down from the walk and went into the dwelling, where he stood at one side. Then the venerable Udena said to him: "There are seats, brahmin, sit down if you wish." "We did not sit down because we were waiting for Master Udena to speak. For how could one like myself presume to sit down on a seat without first being invited to do so?"
Then the brahmin Ghotamukha took a low seat, sat down at one side, and said to the venerable Udena: "Worthy recluse, there is no wanderers' life that accords with the Dhamma: so it seems to me here, and that may be because I have not seen such venerable ones as yourself or because I have not seen the Dhamma here." Udena:"Brahmin, if you think any statement of mine is to be agreed with, then agree with it; if you think any statement of mine is to be argued against, then argue against it; and if you do not understand the meaning of any statement of mine, ask me to clarify it thus: 'How is this, Master Udena? What is the meaning of this?' In this way we can discuss this matter." "Master Udena, if I think any statement of Master Udena's is to be agreed with, I shall agree with it; if I think any statement of his is to be argued against, I shall argue against it; and if I do not understand the meaning of any statement of Master Udena's, then I shall ask Master Udena to clarify it thus: 'How is this Master Udena? What is the meaning of this?' In this way let us discuss this matter."
Udena:"Brahmin, there are four kinds of persons to be found existing in the world. What four?"...(as Sutta 51) .. brahmin:"But, Master Udena, the kind of person who does not torment himself or pursue the practice of torturing himself and who does not torment others or pursue the practice of torturing others; who, since he torments neither himself nor others, is here and now hunger less, extinguished, and cooled, and abides experiencing bliss, having himself become holy - he does not torment and torture either himself or others, both of whom desire pleasure and recoil from pain. That is why this kind of person satisfies my mind."
udena: "Brahmin, there are two kinds of assembly. What two? Here a certain assembly lusts after jewels and earrings and seeks wives and children, men and women slaves, fields and land, gold and silver. But here a certain assembly does not lust after jewels and earrings, but having abandoned wives and children, men and women slaves, fields and land, gold and silver, has gone forth from the home life into homelessness. Now there is this kind of person who does not torment himself or pursue the practice of torturing himself and who does not torment others or pursue the practice of torturing others; who, since he torments neither himself nor others, is here and now hunger less, extinguished, and cooled, and abides experiencing bliss, having himself become holy. In which of the two kinds of assembly do you usually see this person, brahmin - in the assembly that lusts after jewels and earrings and seeks wives and children, men and women slaves, fields and land, gold and silver; or in the assembly that does not lust after jewels and earrings, but having abandoned wives and children...has gone forth from the home life into homelessness?"
Brahmin: "I usually see this kind of person, Master Udena, in the assembly that does not lust after jewels and earrings, but having abandoned wives and children...has gone forth from the home life into homelessness." Udena: "But only just now, brahmin, we understood you to say: 'Worthy recluse, there is no wanderers' life that accords with the Dhamma: so it seems to me here, and that may be because I have not seen such venerable ones as yourself or because I have not seen the Dhamma here.'" Brhamin :"Certainly, Master Udena, it was in order to learn that I spoke those words. There is a wanderers' life that accords with the Dhamma; so it seems to me here, and may Master Udena remember me to have spoken thus. It would be good if, out of compassion, Master Udena would expound to me in detail those four kinds of persons he mentioned in brief."
Udena: "Then, brahmin, listen and attend closely to what I shall say." "Yes, sir," the brahmin Ghotamukha replied. The venerable Udena said this: "Brahmin, what kind of person torments himself and pursues the practice of torturing himself? Here a certain person goes naked...(as Sutta 51) ...and abides experiencing bliss, having himself become holy."
When this was said, the brahmin Ghotamukha said to the venerable Udena: "Magnificent, Master Udena! Magnificent, Master Udena! Master Udena has made the Dhamma clear in many ways, as though he were turning upright what had been overthrown, revealing what was hidden, showing the way to one who was lost, or holding up a lamp in the dark for those with eyesight to see forms. I go to Master Udena for refuge and to the Dhamma and to the Sangha of bhikkhus. From today let Master Udena remember me as a lay follower who has gone to him for refuge for life."
Udena: "Do not go to me for refuge, brahmin. Go for refuge to that same Blessed One to whom I have gone for refuge." Brahmin: "Where is he living now, that Master Gotama, accomplished and fully enlightened, Master Udena?" Udena: "That Blessed One, accomplished and fully enlightened, has attained final Nibbana, brahmin." Brahmin:"If we heard that Master Gotama was within ten leagues, we would go ten leagues in order to see that Master Gotama, accomplished and fully enlightened. If we heard that Master Gotama was within twenty leagues...thirty leagues...forty leagues.. .fifty leagues.. .a hundred leagues, we would go a hundred leagues in order to see that Master Gotama, accomplished and fully enlightened. But since that Master Gotama has attained to final Nibbana, we go to that Master Gotama for refuge and to the Dhamma and to the Sangha of bhikkhus. From today let Master Udena remember me as a lay follower who has gone for refuge for life. "
Brahmin: "Now, Master Udena, the king of Anga gives me a daily donation. Let me give Master Udena a regular donation from that." Udena: "What kind of regular donation does the king of Anga give you, brahmin?" Brahmin: "Five hundred kahapanas, Master Udena." Udena: "It is not allowable for us to accept gold and silver, brahmin." Brahmin:"If it is not allowable for Master Udena, I will have a monastery built for Master Udena."
Udena: "If you desire to have a monastery built for me, brahmin, have an assembly hall built for the Sangha at Pataliputta." Brahmin : "I am still more satisfied and pleased that Master Udena suggests that I give a gift to the Sangha. So with this regular donation and another regular donation, I shall have an assembly hall built for the Sangha at Pataliputta."
Then with that regular donation which he offered to Master Udena and another regular donation added to it the brahmin Ghotamukha had an assembly hall built for the Sangha at Pataliputta. And that is now known as the GhotamukhI.
In summary, the Brahman Ghotamukha asks Venerable Udena on whether the renunciate life accords with the Dhamma. Brahmin is later converted by the bhikkhu Udena with a discourse on the four types of persons found in the world. Udena describes to him the four types of individuals - those who torture themselves, those who torture others, those who torture both and those who torture neither, the last being those who live beyond appetites, consummate, unfevered and blissful.
References: 1. www.accesstoinsight.org 2. https://suttacentral.net/ 3. The long discourses of the Buddha (Bhikkhu Bodhi)