Shiva Purana
ऐलापुत्रस्तथा पद्मः कर्कोटकधनंजयौ॥ महानीलमहाकर्णौ धृतराष्ट्रो बलाहकः ॥ ४६ ॥
The son of Aila and Padma were the sons of Karkotaka and Dhananjaya. Dhritarashtra and Balahak with great blue and great ears.
english translation
ailAputrastathA padmaH karkoTakadhanaMjayau॥ mahAnIlamahAkarNau dhRtarASTro balAhakaH ॥ 46 ॥
hk transliteration by Sanscript