One verse

Srimad Bhagavatam 11.18.2

11.18.2

कन्दमूलफलैर्वन्यैर्मेध्यैर्वृत्तिं प्रकल्पयेत् । वसीत वल्कलं वासस्तृणपर्णाजिनानि वा ॥ २ ॥

kanda-mūla-phalair vanyair medhyair vṛttiṁ prakalpayet vasīta valkalaṁ vāsas tṛṇa-parṇājināni vā

kanda
with bulbs
mūla
roots
phalaiḥ
and fruits
vanyaiḥ
growing in the forest
medhyaiḥ
pure
vṛttim
sustenance
prakalpayet
one should arrange
vasīta
one should put on
valkalam
tree bark
vāsaḥ
as clothes
tṛṇa
grass
parṇa
leaves
ajināni
animal skins
vā
or

Having adopted the vānaprastha order of life, one should arrange one’s sustenance by eating uncontaminated bulbs, roots and fruits that grow in the forest. One may dress oneself with tree bark, grass, leaves or animal skins.