CC Madhya 24.78

ātatatvāc ca mātṛtvād
ātmā hi paramo hariḥ
Synonyms: 
ātatatvāt — due to being all-pervading; ca — and; mātṛtvāt — due to being the progenitor; ātmā — the soul; hi — certainly; paramaḥ — supreme; hariḥ — the Supreme Personality of Godhead.
Translation: 
“ ‘Hari, the Personality of Godhead, is the all-pervasive original source of everything; He is therefore the Supersoul of everything.’
Purport: 

This is a quotation from the Bhāvārtha-dīpikā, Śrīdhara Svāmī’s commentary on Śrīmad-Bhāgavatam.