Shiva Purana
ईश्वर उवाच ॥ प्राक्च पंकजजन्मासौ शास्यस्ते कालभैरव ॥ कालवद्राजसे साक्षात्कालराजस्ततो भवान् ॥ ४६ ॥
Śiva said:— O Kālabhairava, at the outset this lotus-born Brahmā shall be chastised by you. You shine like god of death, hence you are Kālarāja.
english translation
Izvara uvAca ॥ prAkca paMkajajanmAsau zAsyaste kAlabhairava ॥ kAlavadrAjase sAkSAtkAlarAjastato bhavAn ॥ 46 ॥
hk transliteration by Sanscript