Gopalacampu 1.3.35

1.3.35

ambaṣṭhas tu viśaḥ putryāṃ brāhmaṇāj jāta ucyate iti cānyatra | ataḥ pādme sṛṣṭi-khaṇḍādau yajñaṃ kurvatā brahmaṇāpy ābhīra-paryāya-gopa-kanyāyāḥ patnītvena svīkāraḥ prasiddhaḥ | eṣa eva ca gopa-vaṃśaḥ śrī-kṛṣṇa-līlāyāṃ saṃvalanam āpsyatīti | sṛṣṭi-khaṇḍa eva tatra spaṣṭīkṛtam asti | tasmāt parama-śaṃsanīya evāsau vaiśyāntaḥ-pāti-mahābhīra-dvija-vaṃśa iti |

And elsewhere it is said: "An Ambaṣṭha is born from a brāhmaṇa upon the daughter of a Vaiśya." Hence in the Sṛṣṭi-khaṇḍa of the Padma Purāṇa and other texts, it is well known that Brahmā himself, while performing a sacrifice, accepted as his wife the daughter of a cowherd, which is a synonym for Ābhīra. And it is clarified in the very same Sṛṣṭi-khaṇḍa that this very lineage of cowherds would enter into association with Śrī Kṛṣṇa's divine play. Therefore, this lineage of Mahābhīra twice-born falling within the Vaiśya caste is supremely praiseworthy.