Srimad-Bhagavatam: Canto 11 - Chapter 1 - Verse 17

Sanskrit:

निष्किञ्चना मय्यनुरक्तचेतस:शान्ता महान्तोऽखिलजीववत्सला: ।कामैरनालब्धधियो जुषन्ति तेयन्नैरपेक्ष्यं न विदु: सुखं मम ॥ १७ ॥

ITRANS:

niṣkiñcanā mayy anurakta-cetasaḥśāntā mahānto ’khila-jīva-vatsalāḥkāmair anālabdha-dhiyo juṣanti teyan nairapekṣyaṁ na viduḥ sukhaṁ mama

Translation:

Those who are without any desire for personal gratification, whose minds are always attached to Me, who are peaceful, without false ego and merciful to all living entities, and whose consciousness is never affected by opportunities for sense gratification — such persons enjoy in Me a happiness that cannot be known or achieved by those lacking such detachment from the material world.

Purport:

The pure devotees always experience transcendental bliss in their service to Śrī Kṛṣṇa, the reservoir of pleasure; thus they are completely detached from material pleasure and do not desire even liberation. Since all others have some personal desire, they cannot experience such happiness. Pure devotees always desire to give Kṛṣṇa conscious happiness to all others, and therefore they are called mahāntaḥ, or great souls. In the course of a devotee’s service, many opportunities for sense gratification arise, but a pure devotee is not tempted or attracted and does not fall down from his exalted transcendental position.