Kaalabhairava Ashtakam is a lovely Sanskrit hymn, composed by Adi Shankara. It comprises 8 stanzas; which are standard of any Ashtakam. The hymn depicts the qualities of Kaala Bhairava of Kashi, the God of Loss of life. This Bhairava is called remaining black; with out apparel; horrible-on the lookout https://www.youtube.com/watch?v=S2iLMNuDYc0