One verse

Srimad Bhagavatam 3.22.19

3.22.19

अतो भजिष्ये समयेन साध्वीं यावत्तेजो बिभृयादात्मनो मे । अतो धर्मान् पारमहंस्यमुख्यान् शुक्लप्रोक्तान् बहु मन्येऽविहिंस्रान् ॥ १९ ॥

ato bhajisye samayena sadhvim yavat tejo bibhryad atmano me ato dharman paramahamsya-mukhyan sukla-proktan bahu manye ’vihimsran

atah
therefore
bhajisye
I shall accept
samayena
on the conditions
sadhvim
the chaste girl
yavat
until
tejah
semen
bibhryat
may bear
atmanah
from my body
me
my
atah
thereafter
dharman
the duties
paramahamsya-mukhyan
of the best of the paramahamsas
sukla-proktan
spoken by Lord Visnu
bahu
much
manye
I shall consider
avihimsran
free from envy.

Therefore I shall accept this chaste girl as my wife, on the condition that after she bears semen from my body, I shall accept the life of devotional service accepted by the most perfect human beings. That process was described by Lord Visnu. It is free from envy.