Digha Nikaya (Coleção dos Discursos Longos) 2:188
SUJATOYaṁ kho, bhikkhave, cetasikaṁ dukkhaṁ cetasikaṁ asātaṁ manosamphassajaṁ dukkhaṁ asātaṁ vedayitaṁ,
Mental pain, mental displeasure, the painful, unpleasant feeling that’s born from mental contact.