One verse

Srimad Bhagavatam 1.5.35

1.5.35

यदत्र क्रियते कर्म भगवत्परितोषणम् । ज्ञानं यत्तदधीनं हि भक्तियोगसमन्वितम् ॥ ३५ ॥

yad atra kriyate karma bhagavat-paritosanam jnanam yat tad adhinam hi bhakti-yoga-samanvitam

yat
whatever
atra
in this life or world
kriyate
does perform
karma
work
bhagavat
unto the Personality of Godhead
paritosanam
satisfaction of
jnanam
knowledge
yat tat
what is so called
adhinam
dependent
hi
certainly
bhakti-yoga
devotional
samanvitam
dovetailed with bhakti-yoga.

Whatever work is done here in this life for the satisfaction of the mission of the Lord is called bhakti-yoga, or transcendental loving service to the Lord, and what is called knowledge becomes a concomitant factor.