In Satya-yuga the Lord is white and four-armed, has matted locks and wears a garment of tree bark. He carries a black deerskin, a sacred thread, prayer beads and the rod and waterpot of a brahmacārī.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
कृते शुक्लश्चतुर्बाहुर्जटिलो वल्कलाम्बरः । कृष्णाजिनोपवीताक्षान् बिभ्रद्दण्डकमण्डलू
kṛte śuklaścaturbāhurjaṭilo valkalāmbaraḥ | kṛṣṇājinopavītākṣān bibhraddaṇḍakamaṇḍalū
SB 11.5.21