His (Aghasura's) lower lip rested on the surface of the earth, and his upper lip was touching the clouds in the sky. The borders of his mouth resembled the sides of a big cave in a mountain, & the middle of his mouth was as dark as possible - SB 10.12.17
Expressions researched:
"His lower lip rested on the surface of the earth, and his upper lip was touching the clouds in the sky. The borders of his mouth resembled the sides of a big cave in a mountain, and the middle of his mouth was as dark as possible"
Srimad-Bhagavatam
SB Canto 10.1 to 10.13
His lower lip rested on the surface of the earth, and his upper lip was touching the clouds in the sky. The borders of his mouth resembled the sides of a big cave in a mountain, and the middle of his mouth was as dark as possible. His tongue resembled a broad traffic-way, his breath was like a warm wind, and his eyes blazed like fire.
His lower lip rested on the surface of the earth, and his upper lip was touching the clouds in the sky. The borders of his mouth resembled the sides of a big cave in a mountain, and the middle of his mouth was as dark as possible. His tongue resembled a broad traffic-way, his breath was like a warm wind, and his eyes blazed like fire.