CHĀNDOGYA UPANISHAD · 5.24.2

अथ य एतद् एवं विद्वान् अग्निहोत्रं जुहोति तस्य सर्वेषु लोकेषु सर्वेषु भूतेषु सर्वेष्व् आत्मसु हुतं भवति ॥

atha ya etad evaṃ vidvān agnihotraṃ juhoti tasya sarveṣu lokeṣu sarveṣu bhūteṣu sarveṣv ātmasu hutaṃ bhavati ॥

'But he who offers this Agnihotra with a full knowledge of its true purport, he offers it (i.e. he eats food) in all worlds, in all beings, in all Selfs.