Shiva Purana

siva.sh/siva-purana/uma-samhita/1/18

तपःस्थो रुद्रपार्श्वस्थं दृष्टवानहमव्यम् ॥ गुह्यमस्त्रं परं चास्य न तुल्यमधिकं क्वचित् ॥ १८॥

sanskrit

While performing penance, I saw at the side of Rudra the imperishable highly secret weapon which had no other missile superior or equal to it.

english translation

tapaHstho rudrapArzvasthaM dRSTavAnahamavyam ॥ guhyamastraM paraM cAsya na tulyamadhikaM kvacit ॥ 18॥

hk transliteration by Sanscript

siva.sh/siva-purana/uma-samhita/1/18

तपःस्थो रुद्रपार्श्वस्थं दृष्टवानहमव्यम् ॥ गुह्यमस्त्रं परं चास्य न तुल्यमधिकं क्वचित् ॥ १८॥

sanskrit

While performing penance, I saw at the side of Rudra the imperishable highly secret weapon which had no other missile superior or equal to it.

english translation

tapaHstho rudrapArzvasthaM dRSTavAnahamavyam ॥ guhyamastraM paraM cAsya na tulyamadhikaM kvacit ॥ 18॥

hk transliteration by Sanscript