Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 11-12

Sanskrit:

गोपान् समादिशत्सोऽपि गृह्यतां सर्वगोरस: ।उपायनानि गृह्णीध्वं युज्यन्तां शकटानि च ॥ ११ ॥यास्याम: श्वो मधुपुरीं दास्यामो नृपते रसान् ।द्रक्ष्याम: सुमहत्पर्व यान्ति जानपदा: किल ।एवमाघोषयत् क्षत्रा नन्दगोप: स्वगोकुले ॥ १२ ॥

ITRANS:

gopān samādiśat so ’pigṛhyatāṁ sarva-go-rasaḥupāyanāni gṛhṇīdhvaṁyujyantāṁ śakaṭāni ca

Translation:

Nanda Mahārāja then issued orders to the cowherd men by having the village constable make the following announcement throughout Nanda’s domain of Vraja: “Go collect all the available milk products. Bring valuable gifts and yoke your wagons. Tomorrow we shall go to Mathurā, present our milk products to the King and see a very great festival. The residents of all the outlying districts are also going.”

Purport:

Nanda wanted to bring ghee and other milk products as taxes for the King.