Garudapurana 3.12.63

3.12.63

vyāsarāmādirūpeṣvanṛṣivipratvacintanam /
kṛṣṇarāmādirūpeṣu antarasya vicintanam //

conceiving a non-ṛṣi or non-Brahmin status in forms such as Vyāsa and Rāma;
thinking of a difference among forms such as Kṛṣṇa and Rāma;