A Wilderness Dweller
Araññaka Sutta  (AN 4:263)

“Endowed with (any of) four qualities, a monk isn’t fit to stay in isolated forest & wilderness lodgings. Which four? (He is endowed) with thoughts of sensuality, with thoughts of ill will, with thoughts of harmfulness, and he is a person of weak discernment, dull, a drooling idiot. Endowed with (any of) these four qualities, a monk isn’t fit to stay in isolated forest & wilderness dwellings.

“Endowed with four qualities, a monk is fit to stay in isolated forest & wilderness lodgings. Which four? (He is endowed) with thoughts of renunciation, with thoughts of non-ill will, with thoughts of harmlessness, and he is a discerning person, not dull, not a drooling idiot. Endowed with these four qualities, a monk is fit to stay in isolated forest & wilderness dwellings.”

See also: MN 4; MN 19; SN 4:1; SN 9:6; SN 9:11; SN 9:14; AN 5:30; AN 5:77—78; AN 10:99; Ud 2:10; Thag 18