One verse

Srimad Bhagavatam 3.12.55

3.12.55

तदा मिथुनधर्मेण प्रजा ह्येधाम्बभूविरे ॥ ५५ ॥

tada mithuna-dharmena praja hy edham babhuvire

tada
at that time
mithuna
sex life
dharmena
according to regulative principles
prajah
generations
hi
certainly
edham
increased
babhuvire
took place.

Thereafter, by sex indulgence, they gradually increased generations of population one after another.