One verse

Srimad Bhagavatam 7.13.2

7.13.2

बिभृयाद् यद्यसौ वास: कौपीनाच्छादनं परम् । त्यक्तं न लिङ्गाद् दण्डादेरन्यत् किञ्चिदनापदि ॥ २ ॥

bibhryad yady asau vasah kaupinacchadanam param tyaktam na lingad dandader anyat kincid anapadi

bibhryat
one should use
yadi
if
asau
a person in the renounced order
vasah
a garment or covering
kaupina
a loincloth (just to cover the private parts)
acchadanam
for covering
param
that much only
tyaktam
given up
na
not
lingat
than the distinguishing marks of a sannyasi
danda-adeh
like the rod (tridanda)
anyat
other
kincit
anything
anapadi
in ordinary undisturbed times.

A person in the renounced order of life may try to avoid even a dress to cover himself. If he wears anything at all, it should be only a loincloth, and when there is no necessity, a sannyasi should not even accept a danda. A sannyasi should avoid carrying anything but a danda and kamandalu.