Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 9
Sanskrit:
काचित् समं मुकुन्देन स्वरजातीरमिश्रिता: ।उन्निन्ये पूजिता तेन प्रीयता साधु साध्विति ।तदेव ध्रुवमुन्निन्ये तस्यै मानं च बह्वदात् ॥ ९ ॥
ITRANS:
kācit samaṁ mukundenasvara-jātīr amiśritāḥunninye pūjitā tenaprīyatā sādhu sādhv ititad eva dhruvam unninyetasyai mānaṁ ca bahv adāt
Translation:
One gopī, joining Lord Mukunda in His singing, sang pure melodious tones that rose harmoniously above His. Kṛṣṇa was pleased and showed great appreciation for her performance, saying “Excellent! Excellent!” Then another gopī repeated the same melody, but in a special metrical pattern, and Kṛṣṇa praised her also.