Shiva Purana
त्रिभिः शतैः षष्टियुक्तैस्त्रिरावृत्त्या तथा पुनः । रुद्रा क्षैरुपवीतं व निर्मीयाद्भक्तितत्परः २७ ।
A person of pious nature shall make three circular strings in the manner of the sacred thread, each having three hundred and sixty beads.
english translation
tribhiH zataiH SaSTiyuktaistrirAvRttyA tathA punaH । rudrA kSairupavItaM va nirmIyAdbhaktitatparaH 27 ।
hk transliteration by Sanscript