Śrīmad-Bhāgavatam · Text 10.18.17
Who is speaking and story frame
पशूंश्चारयतोर्गोपैस्तद्वने रामकृष्णयो: ।
गोपरूपी प्रलम्बोऽगादसुरस्तज्जिहीर्षया ॥ १७ ॥
paśūṁś cārayator gopais
tad-vane rāma-kṛṣṇayoḥ
gopa-rūpī pralambo ’gād
asuras taj-jihīrṣayā
While Rāma, Kṛṣṇa and Their cowherd friends were thus tending the cows in that Vṛndāvana forest, the demon Pralamba entered their midst. He had assumed the form of a cowherd boy with the intention of kidnapping Kṛṣṇa and Balarāma.
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.