Bhagavad Gita 9.11

अजानन्ति मां मूढ़ा मानुषी तनुमश्रितम् |
परं भावमजानन्तो मम भूतमहेश्वरम्

Translation

When I descend in My personal form deluded persons are unable to recognize Me. They do not know the divinity of My personality, as the Supreme Lord of all beings.