सन्तुष्ट: केन वा राजन्न वर्तेतापि वारिणा ।
औपस्थ्यजैह्व्यकार्पण्याद्गृहपालायते जन: ॥
santuṣṭaḥ kena vā rājan na vartetāpi vāriṇā |
aupasthya-jaihvya-kārpaṇyād gṛha-pālāyate janaḥ ||
(Śrīmad Bhāgavatam: 7.15.18)
“O King! Can a person not become satisfied with anything, even water? [Certainly. Yet] A person acts like a house pet [i.e., a dog] because of avarice for the sensation of the genitals and sensation of the tongue.”