One verse

Srimad Bhagavatam 11.7.38

11.7.38

शश्वत्परार्थसर्वेह: परार्थैकान्तसम्भव: । साधु: शिक्षेत भूभृत्तो नगशिष्य: परात्मताम् ॥ ३८ ॥

śaśvat parārtha-sarvehaḥ parārthaikānta-sambhavaḥ sādhuḥ śikṣeta bhū-bhṛtto naga-śiṣyaḥ parātmatām

śaśvat
always
para
of others
artha
for the sake
sarva-īhaḥ
all of one’s efforts
para-artha
the benefit of others
ekānta
sole
sambhavaḥ
reason for living
sādhuḥ
a saintly person
śikṣeta
should learn
bhū-bhṛttaḥ
from the mountain
naga-śiṣyaḥ
the disciple of the tree
para-ātmatām
dedication to others

A saintly person should learn from the mountain to devote all his efforts to the service of others and to make the welfare of others the sole reason for his existence. Similarly, as the disciple of the tree, he should learn to dedicate himself to others.