Allah, exalted be His praise, said concerning the person who is put to trial because of his religion and is able to emigrate but does not emigrate until he dies: "Indeed, those whose souls the angels take while they are wronging themselves - (the angels) say: In what condition were you? They say: We were weak (and oppressed) in the land." [Surah al-Nisa: 97] (the verse).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / Q17749