Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 29
Sanskrit:
गिरिदर्यां विनिक्षिप्य नीतं नीतं महासुर: ।शिलया पिदधे द्वारं चतु:पञ्चावशेषिता: ॥ २९ ॥
ITRANS:
giri-daryāṁ vinikṣipyanītaṁ nītaṁ mahāsuraḥśilayā pidadhe dvāraṁcatuḥ-pañcāvaśeṣitāḥ
Translation:
Gradually the great demon abducted more and more of the cowherd boys and cast them into a mountain cave, which he sealed shut with a boulder. Finally only four or five boys acting as sheep remained in the game.