One verse

Srimad Bhagavatam 10.24.15

10.24.15

किमिन्द्रेणेह भूतानां स्वस्वकर्मानुवर्तिनाम् । अनीशेनान्यथा कर्तुं स्वभावविहितं नृणाम् ॥ १५ ॥

kim indreṇeha bhūtānāṁ sva-sva-karmānuvartinām anīśenānyathā kartuṁ svabhāva-vihitaṁ nṛṇām

kim
what
indreṇa
with Indra
iha
here
bhūtānām
for living entities
sva-sva
each their own
karma
of fruitive action
anuvartinām
who are experiencing the consequences
anīśena
(Indra) who is incapable
anyathā
otherwise
kartum
to make
svabhāva
by their conditioned natures
vihitam
that which is ordained
nṛṇām
for men

Living beings in this world are forced to experience the consequences of their own particular previous work. Since Lord Indra cannot in any way change the destiny of human beings, which is born of their own nature, why should people worship him?