Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 28
Sanskrit:
मयपुत्रो महामायो व्योमो गोपालवेषधृक् ।मेषायितानपोवाह प्रायश्चोरायितो बहून् ॥ २८ ॥
ITRANS:
maya-putro mahā-māyovyomo gopāla-veṣa-dhṛkmeṣāyitān apovāhaprāyaś corāyito bahūn
Translation:
A powerful magician named Vyoma, son of the demon Maya, then appeared on the scene in the guise of a cowherd boy. Pretending to join the game as a thief, he proceeded to steal most of the cowherd boys who were acting as sheep.