Prashna Upanishad 6.2

तस्मै स होवाच | इहैवान्तःशरीरे सोम्य स पुरुषो यस्मिन्नेताः षोडश कलाः प्रभवन्तीति ॥

tasmai sa hovacha | ihaivaantah sharire somya sa purusho yasmin netah shodasha kalah prabhavantiti ||

To him he said: Here within this very body, dear one, is that Person from whom these sixteen parts arise.

उनसे उन्होंने कहा — हे सौम्य! इसी शरीर के भीतर ही वह पुरुष है, जिसमें ये सोलह कलायें उत्पन्न होती हैं।