ديغا نيكايا 2:191
SUJATOYo kho, bhikkhave, aññataraññatarena byasanena samannāgatassa aññataraññatarena dukkhadhammena phuṭṭhassa āyāso upāyāso āyāsitattaṁ upāyāsitattaṁ,
The stress, distress, state of stress and distress in someone who has undergone misfortune, who has experienced suffering.