Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 19

Sanskrit:

कृत्वा तावन्तमात्मानं यावतीर्गोपयोषित: ।रेमे स भगवांस्ताभिरात्मारामोऽपि लीलया ॥ १९ ॥

ITRANS:

kṛtvā tāvantam ātmānaṁyāvatīr gopa-yoṣitaḥreme sa bhagavāṁs tābhirātmārāmo ’pi līlayā

Translation:

Expanding Himself as many times as there were cowherd women to associate with, the Supreme Lord, though self-satisfied, playfully enjoyed their company.

Purport:

As Śrīla Viśvanātha Cakravartī points out, it has already been explained that Lord Kṛṣṇa is eternally free from all material desire, perfect on the platform of spiritual self-satisfaction.