Śrīmad-Bhāgavatam · Text 11.7.38
Who is speaking and story frame
शश्वत्परार्थसर्वेह: परार्थैकान्तसम्भव: ।
साधु: शिक्षेत भूभृत्तो नगशिष्य: परात्मताम् ॥ ३८ ॥
śaśvat parārtha-sarvehaḥ
parārthaikānta-sambhavaḥ
sādhuḥ śikṣeta bhū-bhṛtto
naga-śiṣyaḥ parātmatām
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.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.