Dhammapada · 25.15
Yato yato sammasati, khandhānaṃ udayabbayaṃ;Labhati pītipāmojjaṃ, amataṃ taṃ vijānataṃ.
Yato yato sammasati, khandhanam udayabbayam; Labhati pitipamojjam, amatam tam vijanatam.
Wherever he contemplates the rising and falling of the aggregates, he gains rapture and joy — the deathless of those who know.
— Dhammapada 25.15
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.