Śrīmad-Bhāgavatam · Text 10.34.4
Who is speaking and story frame
ऊषु: सरस्वतीतीरे जलं प्राश्य यतव्रता: ।
रजनीं तां महाभागा नन्दसुनन्दकादय: ॥ ४ ॥
ūṣuḥ sarasvatī-tīre
jalaṁ prāśya yata-vratāḥ
rajanīṁ tāṁ mahā-bhāgā
nanda-sunandakādayaḥ
Nanda, Sunanda and the other greatly fortunate cowherds spent that night on the bank of the Sarasvatī, strictly observing their vows. They fasted, taking only water.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.