Bhagavad Gita Chapter 11 Verse 23
भगवद् गीता अध्याय 11 श्लोक 23

रूपं महत्ते बहुवक्त्रनेत्रं
महाबाहो बहुबाहूरुपादम्।
बहूदरं बहुदंष्ट्राकरालं
दृष्ट्वा लोकाः प्रव्यथितास्तथाऽहम्।।11.23।।



English Translation - Swami Sivananda
11.23 Having seen Thy immeasurable form with many mouths and eyes, O mighty-armed, with many arms, thighs and feet, with many stomachs and fearful with many teeth  the worlds are terrified and so am I.


English Translation of Sanskrit Commentary By Sri Shankaracharya's
11.23 Mahabaho, O mighty-armed One; drstva, seeing; te, Your; mahat, immence, very vast; upam, form of this kind; bahu-vaktra-netram, with many mouths and eyes; bahu-bahu-uru-padam, having many arms, thighs and feet; and further, bahu-udaram, with many bellies; and bahu-damstra-karalam, fearful with many teeth; lokah, the creatures in the world; are pravya-thitah, struck with terror; tatha, and so also; am even aham, I. 
The reason of that is this:


Transliteration Bhagavad Gita 11.23Roopam mahat te bahuvaktranetramMahaabaaho bahubaahoorupaadam;
Bahoodaram bahudamshtraakaraalamDrishtwaa lokaah pravyathitaastathaa’ham.


Word Meanings Bhagavad Gita 11.23rūpam—form; mahat—magnificent; te—your; bahu—many; vaktra—mouths; netram—eyes; mahā-bāho—mighty-armed Lord; bahu—many; bāhu—arms; ūru—thighs; pādam—legs; bahu-udaram—many stomachs; bahu-danṣhṭrā—many teeth; karālam—terrifying; dṛiṣhṭvā—seeing; lokāḥ—all the worlds; pravyathitāḥ—terror-stricken; tathā—so also; aham—I