Srimad-Bhagavatam: Canto 3 - Chapter 1 - Verse 4
तद्व: प्रसादयाम्यद्य ब्रह्म दैवं परं हि मे ।तद्धीत्यात्मकृतं मन्ये यत्स्वपुम्भिरसत्कृता: ॥ ४ ॥
tad vaḥ prasādayāmy adyabrahma daivaṁ paraṁ hi metad dhīty ātma-kṛtaṁ manyeyat sva-pumbhir asat-kṛtāḥ
To Me, the brāhmaṇa is the highest and most beloved personality. The disrespect shown by My attendants has actually been displayed by Me because the doormen are My servitors. I take this to be an offense by Myself; therefore I seek your forgiveness for the incident that has arisen.
The Lord is always in favor of the brāhmaṇas and the cows, and therefore it is said, go-brāhmaṇa-hitāya ca. Lord Kṛṣṇa, or Viṣṇu, the Supreme Personality of Godhead, is also the worshipable Deity of the brāhmaṇas. In the Vedic literature, in the ṛg-mantra hymns of the Ṛg Veda, it is stated that those who are actually brāhmaṇas always look to the lotus feet of Viṣṇu: oṁ tad viṣṇoḥ paramaṁ padaṁ sadā paśyanti sūrayaḥ. Those who are qualified brāhmaṇas worship only the Viṣṇu form of the Supreme Personality of Godhead, which means Kṛṣṇa, Rāma and all Viṣṇu expansions. A so-called brāhmaṇa who is born in the family of brāhmaṇas but performs activities aimed against the Vaiṣṇavas cannot be accepted as a brāhmaṇa, because brāhmaṇa means Vaiṣṇava and Vaiṣṇava means brāhmaṇa. One who has become a devotee of the Lord is also a brāhmaṇa. The formula is brahma jānātīti brāhmaṇaḥ. A brāhmaṇa is one who has understood Brahman, and a Vaiṣṇava is one who has understood the Personality of Godhead. Brahman realization is the beginning of realization of the Personality of Godhead. One who understands the Personality of Godhead also knows the impersonal feature of the Supreme, which is Brahman. Therefore one who becomes a Vaiṣṇava is already a brāhmaṇa. It should be noted that the glories of the brāhmaṇa described in this chapter by the Lord Himself refer to His devotee-brāhmaṇa, or the Vaiṣṇava. It should never be misunderstood that the so-called brāhmaṇas who are born in brāhmaṇa families but have no brahminical qualifications are referred to in this connection.