Aṅguttara Nikāya 3.43
Translators: sujato
Numbered Discourses 3.43
5. Cūḷavagga
5. The Lesser Chapter
Atthavasasutta
Good Reasons
“Tayo, bhikkhave, atthavase sampassamānena alameva paresaṁ dhammaṁ desetuṁ.
“Mendicants, taking three reasons into consideration provides quite enough motivation to teach Dhamma to another.
Katame tayo?
What three?
Yo dhammaṁ deseti so atthappaṭisaṁvedī ca hoti dhammappaṭisaṁvedī ca.
When the teacher understands the meaning and the teaching.
Yo dhammaṁ suṇāti so atthappaṭisaṁvedī ca hoti dhammappaṭisaṁvedī ca.
When the audience understands the meaning and the teaching.
Yo ceva dhammaṁ deseti yo ca dhammaṁ suṇāti ubho atthappaṭisaṁvedino ca honti dhammappaṭisaṁvedino ca.
When both the teacher and the audience understand the meaning and the teaching.
Ime kho, bhikkhave, tayo atthavase sampassamānena alameva paresaṁ dhammaṁ desetun”ti.
Taking these three reasons into consideration provides quite enough motivation to teach Dhamma to another.”
Tatiyaṁ.