Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 37
Sanskrit:
तत्र गा: पाययित्वाप: सुमृष्टा: शीतला: शिवा: ।ततो नृप स्वयं गोपा: कामं स्वादु पपुर्जलम् ॥ ३७ ॥
ITRANS:
tatra gāḥ pāyayitvāpaḥsu-mṛṣṭāḥ śītalāḥ śivāḥtato nṛpa svayaṁ gopāḥkāmaṁ svādu papur jalam
Translation:
The cowherd boys let the cows drink the clear, cool and wholesome water of the Yamunā. O King Parīkṣit, the cowherd boys themselves also drank that sweet water to their full satisfaction.