One verse

Srimad Bhagavatam 4.29.45

4.29.45

शब्दब्रह्मणि दुष्पारे चरन्त उरुविस्तरे । मन्त्रलिङ्गैर्व्यवच्छिन्नं भजन्तो न विदु: परम् ॥ ४५ ॥

sabda-brahmani duspare caranta uru-vistare mantra-lingair vyavacchinnam bhajanto na viduh param

sabda-brahmani
in the Vedic literature
duspare
unlimited
carantah
being engaged
uru
greatly
vistare
expansive
mantra
of Vedic hymns
lingaih
by the symptoms
vyavacchinnam
partially powerful (the demigods)
bhajantah
worshiping
na viduh
they do not know
param
the Supreme.

Despite the cultivation of Vedic knowledge, which is unlimited, and the worship of different demigods by the symptoms of Vedic mantras, demigod worship does not help one to understand the supreme powerful Personality of Godhead.