Dhammapada · 11.7

Appassutāyaṃ puriso, balibaddova jīrati;Maṃsāni tassa vaḍḍhanti, paññā tassa na vaḍḍhati.

Appassutayam puriso, balibaddova jirati; Mamsani tassa vaddhanti, panna tassa na vaddhati.

This person of little learning grows old like an ox — his flesh increases, but his wisdom does not.

— Dhammapada 11.7

Source: Pali text from the Khuddaka Nikāya of the Pali Canon (oldest extant Buddhist scripture, compiled c. 3rd century BCE). Public-domain English readings drawn from F. Max Müller's translation in Sacred Books of the East, Vol X (1881) and the Buddhist Publication Society's freely-licensed Acharya Buddharakkhita rendering.