The Long Āgama Sūtra 25.8

25.8

「復次，迦葉！彼有智者作如是觀，沙門瞿曇於諸善法、清白、微妙及賢聖法，彼異眾師於諸善法、清白、微妙及賢聖法，誰能堪任增廣修行者？迦葉！彼有智者作如是觀，如是知見，唯有沙門瞿曇堪任增長修行是法。迦葉！彼有智者作如是觀，如是推求，如是論時，我於此中則有名稱。

“Furthermore, Kāśyapa, those who are wise make this observation, ‘The ascetic Gautama has skillful qualities, pristine, sublime, and noble and other teachers have the same qualities. Which of them is capable of cultivating and making them grow?’ Kāśyapa, when the wise make this observation, they thus know and see: ‘Only the ascetic Gautama is capable of cultivating these qualities and making them grow.’ Kāśyapa, when the wise make this observation, inquire into this, and discuss this, I’m the one who they name as being so.