Śrīmad-Bhāgavatam · Text 10.68.13
Who is speaking and story frame
तच्छ्रुत्वा नारदोक्तेन राजन् सञ्जातमन्यव: ।
कुरून् प्रत्युद्यमं चक्रुरुग्रसेनप्रचोदिता: ॥ १३ ॥
tac chrutvā nāradoktena
rājan sañjāta-manyavaḥ
kurūn praty udyamaṁ cakrur
ugrasena-pracoditāḥ
O King, when the Yādavas heard news of this from Śrī Nārada, they became angry. Urged on by King Ugrasena, they prepared for war against the Kurus.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.