SB 10.19.1
sri-suka uvaca
kridasaktesu gopesu
tad-gavo dura-carinih
svairam carantyo vivisus
trna-lobhena gahvaram
Translation:
Sukadeva Gosvami said: While the cowherd boys were completely absorbed in playing, their cows wandered far away. They hungered for more grass, and with no one to watch them they entered a dense forest.