In the Verse 3.24.46 of "Shreemad-Bhagavatam" and further OM VishnuPad VallabhAcharya explains Shuddha-Adwaita Siddhanta. The Tika takes just about 1/4 of a page, but it is extremely imbued with Pushti-Marg-Siddhanta.
आत्मानं सर्व-भूतेषु भगवन्तम् अवस्थितम्
अपश्यत् सर्व-भूतानि भगवत्य् अपि चात्मनि
TRANSLATION: “He saw his own “aatma”, which is our Lord, in everything - both in