Bhairava is also referred to as on as protector, as he guards the 8 directions of the universe. In Shiva temples, once the temple is shut, the keys are put before Bhairava. आग्नेयां च रुरुः पातु दक्षिणे चण्ड भैरवः ॥ पातु शाकिनिका पुत्रः सैन्यं वै कालभैरवः Bhairav Kavach Tabij https://bookmark-nation.com/story16495689/the-definitive-guide-to-bhairav-kavach