Bhagavad Gita 11.31

आख्याहि मे को भवनुग्ररूपो नमोऽस्तु ते देववर प्रसीद |
विज्ञातुमिच्छामि भवन्तमाद्यं न हि प्रजानामि तव प्रवृत्तिम्

Translation

Tell me who You are, so fierce of form. O God of gods, I bow before You; please bestow Your mercy on me. You, who existed before all creation, I wish to know who You are, for I do not comprehend Your nature and workings.