Dhammapada · 2.7

Mā pamādamanuyuñjetha, mā kāmaratisanthavaṃ;Appamatto hi jhāyanto, pappoti vipulaṃ sukhaṃ.

ma pamadam-anuyunjetha, ma kamarati-santhavam; appamatto hi jhayanto, pappoti vipulam sukham.

Do not pursue heedlessness, do not pursue intimacy with sensual delights. The heedful one, meditating, attains abundant happiness.

— Dhammapada 2.7

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.