Shiva Purana
विभूतिर्यस्य नो भाले नांगे रुद्रा क्षधारणम् । नास्ये शिवमयी वाणी तं त्यजेदधमं यथा १३ ।
The man who has no ashes on his forehead, has not worn Rudrākṣa on his body and does not utter names of Śiva shall be shunned as one does a base man.
english translation
vibhUtiryasya no bhAle nAMge rudrA kSadhAraNam । nAsye zivamayI vANI taM tyajedadhamaM yathA 13 ।
hk transliteration by Sanscript