Bhagavad Gita 7.8
O Arjuna! I am the fluidity in water, the light in the sun and moon, the mystic syllable Om in the Vedic scriptures, the sound in ether, and the virility in man.
रसोऽहमप्सु कौन्तेय प्रभास्मि शशिसूर्ययोः।
प्रणवः सर्ववेदेषु शब्दः खे पौरुषं नृषु॥raso'hamapsu kaunteya prabhāsmi śaśisūryayoḥ|
praṇavaḥ sarvavedeṣu śabdaḥ khe pauruṣaṃ nṛṣu||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).