Shiva Purana
यमाश्रित्य महावीरं कौरवास्सुम हाबलाः ॥ भीष्मादयो बभूवुस्तेऽजेया अपि दिवौकसाम् ॥ १६ ॥
By resorting to that powerful hero, Bhīsma and other Kauravas became invincible even to the gods.
english translation
yamAzritya mahAvIraM kauravAssuma hAbalAH ॥ bhISmAdayo babhUvuste'jeyA api divaukasAm ॥ 16 ॥
hk transliteration by Sanscript