Mahabharata 9.60.7
दुष्करं भवता कर्म रणेऽद्य सुमहत्कृतम्कौरवेन्द्रं रणे हत्वा गदयातिकृतश्रमम्
duṣkaraṃ bhavatā karma raṇe'dya sumahatkṛtamkauravendraṃ raṇe hatvā gadayātikṛtaśramam
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book