Śrīmad-Bhāgavatam · Text 10.5.19
Who is speaking and story frame
गोपान् गोकुलरक्षायां निरूप्य मथुरां गत: ।
नन्द: कंसस्य वार्षिक्यं करं दातुं कुरूद्वह ॥ १९ ॥
gopān gokula-rakṣāyāṁ
nirūpya mathurāṁ gataḥ
nandaḥ kaṁsasya vārṣikyaṁ
karaṁ dātuṁ kurūdvaha
Śukadeva Gosvāmī continued: Thereafter, my dear King Parīkṣit, O best protector of the Kuru dynasty, Nanda Mahārāja appointed the local cowherd men to protect Gokula and then went to Mathurā to pay the yearly taxes to King Kaṁsa.
Read Śrīla Prabhupāda's purport on Vedabase.io