Srimad-Bhagavatam: Canto 7 - Chapter 1 - Verse 21
Sanskrit:
केशरोमनखश्मश्रुमलानि जटिलो दधत् ।कमण्डल्वजिने दण्डवल्कलाग्निपरिच्छदान् ॥ २१ ॥
ITRANS:
keśa-roma-nakha-śmaśru-malāni jaṭilo dadhatkamaṇḍalv-ajine daṇḍa-valkalāgni-paricchadān
Translation:
The vānaprastha should wear matted locks of hair on his head and let his body hair, nails and moustache grow. He should not cleanse his body of dirt. He should keep a waterpot, deerskin and rod, wear the bark of a tree as a covering, and use garments colored like fire.