Dullabha Sutta
“The apparition of three things is hard to come by in this world monks.
What three?
(1) A Truth-Finder,
Genuinely worthy and
Perfectly All-Awakened;
(2) One who teaches the Dhamma and Vinaya
Awoken to by a Truth-Finder;
(3) A grateful, appreciative person.
The apparition of three things
is hard to come by in this world bhikkhus.