Annatarabrahmanasutta 3.1

3.1

Duṭṭho kho, brāhmaṇa, dosena abhibhūto pariyādinnacitto attabyābādhāyapi ceteti, parabyābādhāyapi ceteti, ubhayabyābādhāyapi ceteti, cetasikampi dukkhaṃ domanassaṃ paṭisaṃvedeti.

A hateful person, overcome by hate, intends to hurt themselves, hurt others, and hurt both. They experience mental pain and sadness.