One verse

Srimad Bhagavatam 5.17.12

5.17.12

एषु पुरुषाणामयुतपुरुषायुर्वर्षाणां देवकल्पानां नागायुतप्राणानां वज्रसंहननबलवयोमोदप्रमुदितमहासौरतमिथुनव्यवायापवर्गवर्षधृतैकगर्भ कलत्राणां तत्र तु त्रेतायुगसम: कालो वर्तते ॥ १२ ॥

esu purusanam ayuta-purusayur-varsanam deva-kalpanam nagayuta-prananam vajra-samhanana-bala-vayo-moda-pramudita-maha-saurata-mithuna-vyavayapavarga-varsa-dhrtaika-garbha-kalatranam tatra tu treta-yuga-samah kalo vartate.

esu
in these (eight) varsas, or tracts of land
purusanam
of all the men
ayuta
ten thousand
purusa
by the measure of men
ayuh-varsanam
of those whose years of life
deva-kalpanam
who are like the demigods
naga-ayuta-prananam
having the strength of ten thousand elephants
vajra-samhanana
by bodies as solid as thunderbolts
bala
by bodily strength
vayah
by youth
moda
by abundant sense enjoyment
pramudita
being excited
maha-saurata
a great deal of sexual
mithuna
combinations of man and woman
vyavaya-apavarga
at the end of their period of sexual enjoyment
varsa
in the last year
dhrta-eka-garbha
who conceive one child
kalatranam
of those who have wives
tatra
there
tu
but
treta-yuga-samah
exactly like the Treta-yuga (when there is no tribulation)
kalah
time
vartate
exists

In these eight varsas, or tracts of land, human beings live ten thousand years according to earthly calculations. All the inhabitants are almost like demigods. They have the bodily strength of ten thousand elephants. Indeed, their bodies are as sturdy as thunderbolts. The youthful duration of their lives is very pleasing, and both men and women enjoy sexual union with great pleasure for a long time. After years of sensual pleasure—when a balance of one year of life remains—the wife conceives a child. Thus the standard of pleasure for the residents of these heavenly regions is exactly like that of the human beings who lived during Treta-yuga.