Shiva Purana
तदा द्वावसुरौ जातौ विष्णौ कर्णमलेन वै ॥ मधुकैटभनामानौ विख्यातौ पृथिवीतले ॥ ५३ ॥
Then two asuras, Lord Viṣṇu, were born by the stain of their ears. They were known on earth as Madhu and Kaitabha.
english translation
tadA dvAvasurau jAtau viSNau karNamalena vai ॥ madhukaiTabhanAmAnau vikhyAtau pRthivItale ॥ 53 ॥
hk transliteration by Sanscript