Dhammapada · 21.2
Paradukkhūpadhānena, attano sukhamicchati;Verasaṃsaggasaṃsaṭṭho, verā so na parimuccati.
Paradukkhupadhanena, attano sukhamicchati; Verasamsaggasamsattho, vera so na parimuccati.
One who wishes happiness for himself by inflicting suffering on others — entangled in the bond of enmity, he is not freed from enmity.
— Dhammapada 21.2
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.