When Kaal Bhairav was charged of Brahma Hatya, he came to Kashi to seek penance and it was only inside the holy land of Kashi that he was lastly totally free in the sin from the killing. From that time on, Kaal Bhairav is alleged to reside in Kashi, under https://israelevhrz.blue-blogs.com/36843783/considerations-to-know-about-bhairav