Skandapurana 1.4.19.147

1.4.19.147

aghoramaṃtraṃ smara devarāja astraṃ hi yatpāśupataprabhāvam..
rudreṇa tuṣṭena tava pradattamavyāhataṃ vīravarābhighāti.. 21.147 ..

“Remember the Aghora mantra, O King of Gods, for it is the weapon having the power of the Pāśupata, / bestowed upon you by Rudra when he was pleased—irresistible, slayer of foremost heroes.”