The Mukhya Upaniṣads

Īśa · The Whole World in the Light of the Self

Mantra 16

पूषन्नेकर्षे यम सूर्य प्राजापत्य व्यूह रश्मीन् समूह तेजो यत्ते रूपं कल्याणतमं तत्ते पश्यामि योऽसावसौ पुरुषः सोऽहमस्मि ॥ १६ ॥

In plain words

O Pūṣan, solitary seer, controller, Sun, child of Prajāpati: withdraw your rays and gather your dazzling light. I behold that loveliest form of yours. That Person who is there—He am I.