Srimad-Bhagavatam: Canto 4 - Chapter 1 - Verse 6
Sanskrit:
कपिलो नारदो दत्तो योगेशा: सनकादय: ।तमन्वीयुर्भागवता ये च तत्सेवनोत्सुका: ॥ ६ ॥
ITRANS:
kapilo nārado dattoyogeśāḥ sanakādayaḥtam anvīyur bhāgavatāye ca tat-sevanotsukāḥ
Translation:
Great devotees, who were always engaged in the service of the Supreme Personality of Godhead, as well as the great sages named Kapila, Nārada and Dattātreya, and masters of mystic powers, headed by Sanaka Kumāra, all attended the great sacrifice with Lord Viṣṇu.