One verse

Srimad Bhagavatam 4.24.50

4.24.50

पूररेचकसंविग्नवलिवल्गुदलोदरम् । प्रतिसङ्‌क्रामयद्विश्वं नाभ्यावर्तगभीरया ॥ ५० ॥

pura-recaka-samvigna- vali-valgu-dalodaram pratisankramayad visvam nabhyavarta-gabhiraya

pura
inhaling
recaka
exhaling
samvigna
agitated
vali
the wrinkles on the abdomen
valgu
beautiful
dala
like the banyan leaf
udaram
abdomen
pratisankramayat
coiling down
visvam
universe
nabhya
navel
avarta
screwing
gabhiraya
by deepness.

The Lord’s abdomen is beautiful due to three ripples in the flesh. Being so round, His abdomen resembles the leaf of a banyan tree, and when He exhales and inhales, the movement of the ripples appears very, very beautiful. The coils within the navel of the Lord are so deep that it appears that the entire universe sprouted out of it and yet again wishes to go back.