Bhagavatapurana 6.16.36

6.16.36

paramāṇuparamamahatos tvamādyantāntaravartī trayavidhuraḥ /
ādāvante 'pi ca sattvānāṃ yaddhruvaṃ tadevāntarāle 'pi //

36. Thou art in the front, at the back and in the middle of Paramanu and that of the highest dimensions; but Thou art without these three limitations and Thou art that very thing which is permanent and unchanging at the beginning and at the end of all things created as well as in the interim.