Shiva Purana
तस्यास्त्ववयवैरेव व्याप्तं सर्वमिदं जगत् ॥ सूक्ष्मातिसूक्ष्ममीशानं कललस्यापि मध्यतः ॥ ३४ ॥
The entire universe is pervaded by the elements of that Supreme Personality of Godhead. The subtle and very subtle Lord is in the middle of the mud.
english translation
tasyAstvavayavaireva vyAptaM sarvamidaM jagat ॥ sUkSmAtisUkSmamIzAnaM kalalasyApi madhyataH ॥ 34 ॥
hk transliteration by Sanscript