When Kaal Bhairav was charged of Brahma Hatya, he came to Kashi to seek penance and it had been only from the holy land of Kashi that he was finally totally free with the sin in the killing. From that point on, Kaal Bhairav is said to reside in Kashi, https://baglamukhi86307.wizzardsblog.com/30098492/5-easy-facts-about-bhairav-described