Upaniṣads · Chāndogya 5.7

Chāndogya 5.7.1

पुरुषो वाव गौतमाग्निस्तस्य वागेव समित्प्राणो धूमो जिह्वार्चिश्चक्षुरङ्गाराः श्रोत्रं विस्फुलिङ्गाः ॥ ५.७.१ ॥

Gautama, man indeed is fire. His speech is the kindling-wood, his breath the smoke, his tongue the flame, his eye the embers, his ear the sparks.

तस्मिन्नेतस्मिन्नग्नौ देवा अन्नं जुह्वति तस्या आहुते रेतः सम्भवति ॥ ५.७.२ ॥

In this very fire the gods offer food as an oblation; from that oblation, seed (retas) comes into being.