Chapter 7 · Knowledge and Realisation · Krishna said
Bhagavad Gita 7.8 — The essence in everything
रसोऽहमप्सु कौन्तेय प्रभास्मि शशिसूर्ययोः। प्रणवः सर्ववेदेषु शब्दः खे पौरुषं नृषु ॥
raso'hamapsu kaunteya prabhāsmi śaśisūryayoḥ | praṇavaḥ sarvavedeṣu śabdaḥ khe pauruṣaṃ nṛṣu ||
Meaning
I am the taste in water, Arjuna, the light of the moon and sun, the sacred syllable Om in all the Vedas, the sound in space and the strength in human beings.