an.6.96 Aṅguttara Nikāya (Numbered Discourses)

Appearance

“Mendicants, the appearance of six things is rare in the world.
What six?
A Realized One, a perfected one, a fully awakened Buddha. A person who teaches the teaching and training proclaimed by a Realized One. Rebirth in a civilized region. Unimpaired sense faculties. Being bright and clever. Enthusiasm for skillful qualities.
The appearance of these six things is rare in the world.”