Shiva Purana
किमत्र बहुनोक्तेन भक्तास्सर्वेधिकारिणः ॥ मम पञ्चाक्षरे मंत्रे तस्माच्छ्रेष्ठतरो हि सः ॥ २० ॥
Of what avail is much talk? The devotees are authorised in my five-syllabled mantra which is the most excellent one.
english translation
kimatra bahunoktena bhaktAssarvedhikAriNaH ॥ mama paJcAkSare maMtre tasmAcchreSThataro hi saH ॥ 20 ॥
hk transliteration by Sanscript