Dhammapada · 25.5
Dhammārāmo dhammarato, dhammaṃ anuvicintayaṃ;Dhammaṃ anussaraṃ bhikkhu, saddhammā na parihāyati.
Dhammaramo dhammarato, dhammam anuvicintayam; Dhammam anussaram bhikkhu, saddhamma na parihayati.
The bhikkhu who delights in Dhamma, rejoices in Dhamma, ponders Dhamma, recalls Dhamma — does not fall away from the true Dhamma.
— Dhammapada 25.5
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.