[145] But the student Ambaṭṭha, while walking, exchanged some polite words or other with the Blessed One, who was seated; while standing, too, he exchanged some polite words or other with the Blessed One, who was seated. Then the Blessed One said to the student Ambaṭṭha: "Is this, Ambaṭṭha, how your conversation goes with elderly, aged brahmins, teachers of teachers — just as now, walking and standing, you exchange some polite words or other with me, who am seated?"
"No indeed, Master Gotama. For a brahmin who is walking, Master Gotama, may properly converse with a brahmin who is walking; a brahmin who is standing, Master Gotama, may properly converse with a brahmin who is standing; a brahmin who is seated, Master Gotama, may properly converse with a brahmin who is seated; a brahmin who is lying down, Master Gotama, may properly converse with a brahmin who is lying down. But as for those shaveling petty ascetics, menials, black ones, offspring of our Kinsman's feet — with them, Master Gotama, I converse just as I do with Master Gotama."
"But, Ambaṭṭha, your coming here was surely with some purpose. Whatever purpose you came for, to that very purpose you should attend carefully. Though this student Ambaṭṭha has not completed the training, he conceives himself as one who has completed it. What is this but the very fact of not having completed the training?"
Then the student Ambaṭṭha, being addressed by the Blessed One with the word "one who has not completed the training," became angry and displeased; reviling the Blessed One himself, disparaging the Blessed One himself, and saying of the Blessed One himself, "The ascetic Gotama shall be worsted by me!", he said this to the Blessed One: "Fierce, Master Gotama, is the Sakyan breed; harsh, Master Gotama, is the Sakyan breed; rash, Master Gotama, is the Sakyan breed; violent, Master Gotama, is the Sakyan breed. Being menials, being mere menials, they do not honor brahmins, they do not respect brahmins, they do not esteem brahmins, they do not venerate brahmins, they do not defer to brahmins. This, Master Gotama, is not fitting, this is not proper — that these Sakyans, being menials, being mere menials, do not honor brahmins, do not respect brahmins, do not esteem brahmins, do not venerate brahmins, do not defer to brahmins."
Thus did the student Ambaṭṭha hurl at the Sakyans this first charge of being menials.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.