अनेकवक्त्रनयनमनेकाद्भुतदर्शनम्।अनेकदिव्याभरणं दिव्यानेकोद्यतायुधम्॥
aneka-vaktra-nayanam anekādbhuta-darśanamaneka-divyābharaṇaṃ divyānekodyatāyudham
Word by word
The verse says
With many mouths and eyes, with many astonishing sights, with many divine ornaments, and many divine weapons raised.
In plain words
The description begins, and the first word of nearly every phrase is many.
Aneka, four times in two lines. Many, many, many, many.
Language has already run out and the vision has barely started.
Where you've felt this · in creative work
Your brother tries to describe a concert he went to and keeps saying there were so many parts, so many voices, so many things happening at once. You can tell he is not being lazy about it. He is reaching for a word that would do the job, and there is not one.
Going deeper
Repetition of a single word is what a description does when it has been defeated, and Sañjaya's is being defeated from the first line.
He is a trained reporter — his whole function in the story is to see accurately and report. What he produces here is four repetitions of many, then a list of things that do not add up to a shape: mouths, eyes, ornaments, raised weapons. The parts are concrete. The whole is not described at all, because it cannot be.
This is the opposite of how the book normally works. Everywhere else it is precise, and here it stops being able to be.
Which tells you something about the kind of thing being pointed at. A text that could describe this neatly would be describing something smaller. The breakdown in the language is not a weakness in the account; it is the most accurate part of it.