Shiva Purana
भैरवः पूर्णरूपो हि शंकरस्य परात्मनः ॥ मूढास्तं वै न जानन्ति मोहिताश्शिवमायया ॥ २ ॥
Bhairava is the prior form of Siva, the great soul. Fools who are deluded by Śiva’s Māyā do not know about it.
english translation
bhairavaH pUrNarUpo hi zaMkarasya parAtmanaH ॥ mUDhAstaM vai na jAnanti mohitAzzivamAyayA ॥ 2 ॥
hk transliteration by Sanscript