Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 25

Sanskrit:

भगवत्युत्तम:श्लोके भवतीभिरनुत्तमा ।भक्ति: प्रवर्तिता दिष्‍ट्या मुनीनामपि दुर्लभा ॥ २५ ॥

ITRANS:

bhagavaty uttamaḥ-ślokebhavatībhir anuttamābhaktiḥ pravartitā diṣṭyāmunīnām api durlabhā

Translation:

By your great fortune you have established an unexcelled standard of pure devotion for the Lord, Uttamaḥśloka — a standard even the sages can hardly attain.

Purport:

The term pravartitā indicates that the gopīs brought to this world a standard of pure love of God that was previously unknown on the earth. Thus Uddhava congratulates them on their unparalleled contribution to the religious life.