Mahabharata 8.4.9

घोररूपान्परिक्लेशान्दुर्योधनकृतान्बहून्प्रतिज्ञां स्मरता चैव भीमसेनेन पातितः

ghorarūpānparikleśānduryodhanakṛtānbahūnpratijñāṃ smaratā caiva bhīmasenena pātitaḥ

Our plain-language meaning of this verse is waiting for scholar review.