In length and breadth the animal's (Aghasura) tongue resembles a broad traffic-way, and the inside of its mouth is very, very dark, like a cave in a mountain - SB 10.12.22

Expressions researched:
"In length and breadth the animal's tongue resembles a broad traffic-way, and the inside of its mouth is very, very dark, like a cave in a mountain"

Srimad-Bhagavatam

SB Canto 10.1 to 10.13

In length and breadth the animal's tongue resembles a broad traffic-way, and the inside of its mouth is very, very dark, like a cave in a mountain.

SB 10.12.22, Translation

In length and breadth the animal's tongue resembles a broad traffic-way, and the inside of its mouth is very, very dark, like a cave in a mountain.