The Bhagavad Gita with Commentaries of Ramanuja, Madhva, Shankara and Others.
Bhagavad Gita 11.16
http://www.bhagavad-gita.us/articles/249/1/Bhagavad-Gita-1116/Page1.html
By Bhagavan Sri Krishna
 

Text 16

aneka-bahudara-vaktra-netram
pasyami tvam sarvato ’nanta-rupam
nantam na madhyam na punas tavadim
pasyami visvesvara vishva-rupa

Translation

O Lord of the universe, O universal form, I see in Your body many, many arms, bellies, mouths and eyes, expanded everywhere, without limit. I see in You no end, no middle and no beginning. 

Commentary by Srila Prabhupada 

Krishna is the Supreme Personality of Godhead and is unlimited; thus through Him everything could be seen.

Commentary by Sri Visvanatha Cakravarti Thakur

Visvesvara means the original person, the origin of this form.