One verse

Srimad Bhagavatam 8.5.48

8.5.48

नावम: कर्मकल्पोऽपि विफलायेश्वरार्पित: । कल्पते पुरुषस्यैव स ह्यात्मा दयितो हित: ॥ ४८ ॥

navamah karma-kalpo ’pi viphalayesvararpitah kalpate purusasyaiva sa hy atma dayito hitah

na
not
avamah
very little, or insignificant
karma
activities
kalpah
rightly executed
api
even
viphalaya
go in vain
isvara-arpitah
because of being dedicated to the Supreme Personality of Godhead
kalpate
it is so accepted
purusasya
of all persons
eva
indeed
sah
the Supreme Personality of Godhead
hi
certainly
atma
the Supersoul, the supreme father
dayitah
extremely dear
hitah
beneficial

Activities dedicated to the Supreme Personality of Godhead, even if performed in small measure, never go in vain. The Supreme Personality of Godhead, being the supreme father, is naturally very dear and always ready to act for the good of the living entities.