Araññasutta
“Pañcahi, bhikkhave, dhammehi samannāgato bhikkhu alaṁ araññavanapatthāni pantāni senāsanāni paṭisevituṁ. Katamehi pañcahi? Idha, bhikkhave, bhikkhu sīlavā hoti …pe… samādāya sikkhati sikkhāpadesu; bahussuto hoti …pe… diṭṭhiyā suppaṭividdhā; āraddhavīriyo viharati thāmavā daḷhaparakkamo anikkhittadhuro kusalesu dhammesu; catunnaṁ jhānānaṁ ābhicetasikānaṁ diṭṭhadhammasukhavihārānaṁ nikāmalābhī hoti akicchalābhī akasiralābhī; āsavānaṁ khayā anāsavaṁ cetovimuttiṁ paññāvimuttiṁ diṭṭheva dhamme sayaṁ abhiññā sacchikatvā upasampajja viharati. Imehi kho, bhikkhave, pañcahi dhammehi samannāgato bhikkhu alaṁ araññavanapatthāni pantāni senāsanāni paṭisevitun”ti.
Wilderness
“Mendicants, when a mendicant has five qualities they’re ready to frequent remote lodgings in the wilderness and the forest. What five? It’s when a mendicant is ethical, restrained in the monastic code, conducting themselves well and resorting for alms in suitable places. Seeing danger in the slightest fault, they keep the rules they’ve undertaken. They’re very learned, remembering and keeping what they’ve learned. These teachings are good in the beginning, good in the middle, and good in the end, meaningful and well-phrased, describing a spiritual practice that’s totally full and pure. They are very learned in such teachings, remembering them, reciting them, mentally scrutinizing them, and penetrating them theoretically. They live with energy roused up. They’re strong, staunchly vigorous, not slacking off when it comes to developing skillful qualities. They get the four absorptions—blissful meditations in this life that belong to the higher mind—when they want, without trouble or difficulty. They realize the undefiled freedom of heart and freedom by wisdom. And they live having realized it with their own insight in this very life due to the ending of defilements. When a mendicant possesses these five qualities they’re ready to frequent remote lodgings in the wilderness and the forest.”