Bhagwad Gita Chapter 10 verse 20
अहमात्मा गुडाकेश सर्वभुताशयस्थित: ॥
अहमादिश्च मध्यं च भुतानामन्त एव च ॥
I am the Self, O Gudakesha (Arjuna —Conqueror-of-sleep), dwelling in the hearts of all beings.I am verily am the Beginning, the middle and also the end of all beings.
Explanation According to Advaita
This one verse from Brihadaranyak upanishad to explain Advaita philosophy
अहम् ब्रम्हास्मि / Aham Bramhhasmi I am(the self or atman) the bramhan
Explanation according to Vishitadvaita
Enthroned as such within the atma of all living entities as paramatma the Supreme Lord is the beginning, the middle and the end of all beings and their cause, their evolution and their dissolution.
From Bhagwad Ramanujacharya's Gita Bhasya
This verse is consistent with Vishitadvaita and Adivata thought school but how is this verse explained by Dvaita.