AITAREYA UPANISHAD · 1.2.4

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

agnirvāgbhūtvā mukhaṃ prāviśad vāyuḥ prāṇo bhūtvā nāsike prāviśadādityaścakṣurbhūtvākṣiṇī prāviśad diśaḥ śrotraṃ bhūtvā karṇau prāviśannoṣadhivanaspatayo lomāni bhūtvā tvacaṃ prāviśaṃścandramā mano bhūtvā hṛdayaṃ prāviśanmṛtyurapāno bhūtvā nābhiṃ prāviśadāpo reto bhūtvā śiśnaṃ prāviśan ॥ 4 ॥

Fire became Speech and entered into the mouth; Air became Breath and entered into the nostrils; the Sun became Sight and entered into the eyes; the Quarters became Hearing and entered into the ears; Herbs of healing and the plants and trees became Hairs and entered into the skin; the Moon became Mind and entered into the heart; Death became Apana, the lower breathing, and entered into the navel; the Waters became Seed and entered into the organ.

Sri Aurobindo · CWSA 18, p. 199