Shiva Purana
शक्र उवाच ॥ बलिष्ठाश्शत्रवस्ते च दुर्योधनपुरःसराः ॥ द्रोणो भीमश्च कर्णश्च सर्वे ते दुर्जया धुवम् ॥ ५३ ॥
Indra said:— Your enemies, Duryodhana and others are very powerful. Droṇa, Bhīṣma, Karṇa and others are certainly invincible.
english translation
zakra uvAca ॥ baliSThAzzatravaste ca duryodhanapuraHsarAH ॥ droNo bhImazca karNazca sarve te durjayA dhuvam ॥ 53 ॥
hk transliteration by Sanscript