Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 46

Sanskrit:

उद्गायतीनामरविन्दलोचनंव्रजाङ्गनानां दिवमस्पृशद् ध्वनि: ।दध्नश्च निर्मन्थनशब्दमिश्रितोनिरस्यते येन दिशाममङ्गलम् ॥ ४६ ॥

ITRANS:

udgāyatīnām aravinda-locanaṁvrajāṅganānāṁ divam aspṛśad dhvaniḥdadhnaś ca nirmanthana-śabda-miśritonirasyate yena diśām amaṅgalam

Translation:

As the ladies of Vraja loudly sang the glories of lotus-eyed Kṛṣṇa, their songs blended with the sound of their churning, ascended to the sky and dissipated all inauspiciousness in every direction.

Purport:

The gopīs were absorbed in thought of Kṛṣṇa and were thus feeling His presence. Therefore they could joyfully sing.