One verse

Srimad Bhagavatam 6.18.45

6.18.45

श्रीकश्यप उवाच पुत्रस्ते भविता भद्रे इन्द्रहादेवबान्धव: । संवत्सरं व्रतमिदं यद्यञ्जो धारयिष्यसि ॥ ४५ ॥

sri-kasyapa uvaca putras te bhavita bhadre indra-hadeva-bandhavah samvatsaram vratam idam yady anjo dharayisyasi

sri-kasyapah uvaca
Kasyapa Muni said
putrah
son
te
your
bhavita
will be
bhadre
O gentle woman
indra-ha
killer of Indra, or follower of Indra
adeva-bandhavah
friend of the demons (or deva-bandhavah—friend of the demigods)
samvatsaram
for a year
vratam
vow
idam
this
yadi
if
anjah
properly
dharayisyasi
you will execute.

Kasyapa Muni said: My dear gentle wife, if you follow my instructions regarding this vow for at least one year, you will surely get a son who will be able to kill Indra. However, if you deviate from this vow of following the Vaisnava principles, you will get a son who will be favorable to Indra.