Srimad-Bhagavatam: Canto 8 - Chapter 1 - Verse 17
Sanskrit:
तथापि वदतो भूमन् करिष्याम्यनुशासनम् ।एतच्छ्रेय: परं पुंसां यत् तवाज्ञानुपालनम् ॥ १७ ॥
ITRANS:
tathāpi vadato bhūmankariṣyāmy anuśāsanametac chreyaḥ paraṁ puṁsāṁyat tavājñānupālanam
Translation:
Lord Viṣṇu, I must nonetheless act in obedience to Your order because obeying Your order is most auspicious and is the first duty of everyone.