Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 9

Sanskrit:

देवर्षिरुपसङ्गम्य भागवतप्रवरो नृप ।कृष्णमक्लिष्टकर्माणं रहस्येतदभाषत ॥ ९ ॥

ITRANS:

devarṣir upasaṅgamyabhāgavata-pravaro nṛpakṛṣṇam akliṣṭa-karmāṇaṁrahasy etad abhāṣata

Translation:

My dear King, thereafter Lord Kṛṣṇa was approached in a solitary place by the great sage among the demigods, Nārada Muni. That most exalted devotee spoke as follows to the Lord, who effortlessly performs His pastimes.

Purport:

After speaking with Kaṁsa, Nārada went to see Lord Kṛṣṇa. The Lord’s Vṛndāvana pastimes were nearly completed, and Nārada wanted to see those He would enact in Mathurā.