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

Sanskrit:

श्रीशुक उवाचगोप्य: कृष्णे वनं याते तमनुद्रुतचेतस: ।कृष्णलीला: प्रगायन्त्यो निन्युर्दु:खेन वासरान् ॥ १ ॥

ITRANS:

śrī-śuka uvācagopyaḥ kṛṣṇe vanaṁ yātetam anudruta-cetasaḥkṛṣṇa-līlāḥ pragāyantyoninyur duḥkhena vāsarān

Translation:

Śukadeva Gosvāmī said: Whenever Kṛṣṇa went to the forest, the minds of the gopīs would run after Him, and thus the young girls sadly spent their days singing of His pastimes.

Purport:

Although the gopīs enjoyed direct association with Kṛṣṇa at night in the rāsa dance, during the day He went about His normal duties, tending His cows in the forest. At that time the minds of the gopīs would run after Him, but the young girls had to stay back in the village and do their own duties. Thus feeling the pain of separation, they would sing about Śrī Kṛṣṇa’s transcendental pastimes.