Aggannasutta 21.4

21.4

Iti kho, vāseṭṭha, evametassa khattiyamaṇḍalassa porāṇena aggaññena akkharena abhinibbatti ahosi tesaṃyeva sattānaṃ, anaññesaṃ. Sadisānaṃyeva, no asadisānaṃ. Dhammeneva, no adhammena.

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