Bhagavatapurana 10.21.2

10.21.2

kusumita-vanarāji-śuṣmi-bhṛṅga dvija-kula-ghuṣṭa-saraḥ-sarin-mahīdhram /
madhupatir avagāhya cārayan gāḥ saha-paśu-pāla-balaś cukūja veṇum //

2. While tending his cows along with Balarama and his cowherds, the Lord of Madhus (Sri Krishna) advanced into the woods where lakes and rivers, hill and dale, resounded with the hummings

and warblings of joyous bees and birds through the glades of trees in full blossom, and sweetly sounded his pipe.