The Mukhya Upaniṣads

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Passage 4

अग्निर्वाग्भूत्वा मुखं प्राविशद्वायुः प्राणो भूत्वा नासिके प्राविशदादित्यश्चक्षुर्भूत्वाक्षिणी प्राविशद्दिशः श्रोत्रं भूत्वा कर्णौ प्राविशन्नोषधिवनस्पतयो लोमानि भूत्वा त्वचं प्राविशंश्चन्द्रमा मनो भूत्वा हृदयं प्राविशन्मृत्युरपानो भूत्वा नाभिं प्राविशदापो रेतो भूत्वा शिश्नं प्राविशन् ॥ ४ ॥

In plain words

Fire became speech and entered the mouth. Wind became breath and entered the nostrils. The sun became sight and entered the eyes. The directions became hearing and entered the ears. Plants and trees became body-hairs and entered the skin. The moon became mind and entered the heart. Death became the outward breath and entered the navel. The waters became seed and entered the generative organ.