Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 39

Sanskrit:

तस्य वै देवदेवस्य हरेर्यज्ञपते: प्रभो: ।ब्राह्मणा: प्रभवो दैवं न तेभ्यो विद्यते परम् ॥ ३९ ॥

ITRANS:

tasya vai deva-devasyaharer yajña-pateḥ prabhoḥbrāhmaṇāḥ prabhavo daivaṁna tebhyo vidyate param

Translation:

Lord Hari is the God of all gods, the master of all sacrifices, and the supreme ruler. But He accepts the saintly brāhmaṇas as His masters, and so there exists no deity higher than them.

Purport:

Śrīla Viśvanātha Cakravartī points out that even though Śrī Kṛṣṇa is the supreme ruler of creation, He accepts the brāhmaṇas as His masters; even though He is the God of all gods, the brāhmaṇas are His deities; and even though He is the Lord of all sacrifices, He performs sacrifices to worship them.