One verse

Srimad Bhagavatam 4.21.40

4.21.40

पुमाँल्लभेतानतिवेलमात्मन: प्रसीदतोऽत्यन्तशमं स्वत: स्वयम् । यन्नित्यसम्बन्धनिषेवया तत: परं किमत्रास्ति मुखं हविर्भुजाम् ॥ ४० ॥

pumal labhetanativelam atmanah prasidato ’tyanta-samam svatah svayam yan-nitya-sambandha-nisevaya tatah param kim atrasti mukham havir-bhujam

puman
a person
labheta
can achieve
anati-velam
without delay
atmanah
of his soul
prasidatah
being satisfied
atyanta
the greatest
samam
peace
svatah
automatically
svayam
personally
yat
whose
nitya
regular
sambandha
relationship
nisevaya
by dint of service
tatah
after that
param
superior
kim
what
atra
here
asti
there is
mukham
happiness
havih
clarified butter
bhujam
those who drink

By regular service to the brahmanas and Vaisnavas, one can clear the dirt from his heart and thus enjoy supreme peace and liberation from material attachment and be satisfied. In this world there is no fruitive activity superior to serving the brahmana class, for this can bring pleasure to the demigods, for whom the many sacrifices are recommended.