Śrīmad-Bhāgavatam · Text 10.21.2
Who is speaking and story frame
कुसुमितवनराजिशुष्मिभृङ्ग-
द्विजकुलघुष्टसर:सरिन्महीध्रम् ।
मधुपतिरवगाह्य चारयन् गा:
सहपशुपालबलश्चुकूज वेणुम् ॥ २ ॥
kusumita-vanarāji-śuṣmi-bhṛṅga
dvija-kula-ghuṣṭa-saraḥ-sarin-mahīdhram
madhupatir avagāhya cārayan gāḥ
saha-paśu-pāla-balaś cukūja veṇum
The lakes, rivers and hills of Vṛndāvana resounded with the sounds of maddened bees and flocks of birds moving about the flowering trees. In the company of the cowherd boys and Balarāma, Madhupati [Śrī Kṛṣṇa] entered that forest, and while herding the cows He began to vibrate His flute.
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.