Bhagavatapurana 6.9.38

6.9.38

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sa eva hi punaḥ sarvavastuni vastusvarūpaḥ sarveśvaraḥ sakalajagatkāraṇakāraṇabhūtaḥ sarvapratyagātmatvāt sarvaguṇābhāsopalakṣita eka eva paryavaśeṣitaḥ //

38. (6) That Lord Himself is in every thing and He is the very essence of every thing that truly exists, the Ruler of all, the cause of all the causes of Universe and being the Antaryamin of all, He is the One indicated by every light afforded by objects. He is the One true existence conclusively shown by denying every other existence.