Śrīmad-Bhāgavatam · Text 10.22.29
Who is speaking and story frame
अथ गोपै: परिवृतो भगवान् देवकीसुत: ।
वृन्दावनाद्गतो दूरं चारयन् गा: सहाग्रज: ॥ २९ ॥
atha gopaiḥ parivṛto
bhagavān devakī-sutaḥ
vṛndāvanād gato dūraṁ
cārayan gāḥ sahāgrajaḥ
Some time later Lord Kṛṣṇa, the son of Devakī, surrounded by His cowherd friends and accompanied by His elder brother, Balarāma, went a good distance away from Vṛndāvana, herding the cows.
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.