Sekhasutta
Evaṁ me sutaṁ— ekaṁ samayaṁ bhagavā kosambiyaṁ viharati ghositārāme. Tatra kho bhagavā bhikkhū āmantesi: “atthi nu kho, bhikkhave, pariyāyo yaṁ pariyāyaṁ āgamma sekho bhikkhu sekhabhūmiyaṁ ṭhito ‘sekhosmī’ti pajāneyya, asekho bhikkhu asekhabhūmiyaṁ ṭhito ‘asekhosmī’ti pajāneyyā”ti?
A Trainee
So I have heard. At one time the Buddha was staying near Kosambī in Ghosita’s monastery. There the Buddha addressed the mendicants: “Mendicants, is there a way that a mendicant who is a trainee, standing at the level of a trainee, can understand that they are a trainee? And that a mendicant who is an adept, standing at the level of an adept, can understand that they are an adept?”