Aggannasutta 25.3

25.3

Iti kho, vāseṭṭha, evametassa suddamaṇḍalassa porāṇena aggaññena akkharena abhinibbatti ahosi tesaṃyeva sattānaṃ anaññesaṃ, sadisānaṃyeva no asadisānaṃ, dhammeneva, no adhammena.

And that, Vāseṭṭha, is how the ancient primordial term for the circle of menials was created; for those very beings, not others; for those like them, not unlike; by virtue of principle, not against principle.