SB 10.13.12

bhārataivaṁ vatsa-peṣu
 bhuñjāneṣv acyutātmasu
vatsās tv antar-vane dūraṁ
 viviśus tṛṇa-lobhitāḥ
Synonyms: 
bhārata — O Mahārāja Parīkṣit; evam — in this way (while they were enjoying their lunch); vatsa-peṣu — along with all the boys tending the calves; bhuñjāneṣu — engaged in taking their food; acyuta-ātmasu — all of them being very near and dear to Acyuta, Kṛṣṇa; vatsāḥ — the calves; tu — however; antaḥ-vane — within the deep forest; dūram — far away; viviśuḥ — entered; tṛṇa-lobhitāḥ — being allured by green grass.
Translation: 
O Mahārāja Parīkṣit, while the cowherd boys, who knew nothing within the core of their hearts but Kṛṣṇa, were thus engaged in eating their lunch in the forest, the calves went far away, deep into the forest, being allured by green grass.