Surah Yusuf (Joseph), Verse 85

قَالُوْا تَاللّٰهِ تَفْتَؤُا تَذْكُرُ یُوْسُفَ حَتّٰی تَكُوْنَ حَرَضًا اَوْ تَكُوْنَ مِنَ الْهٰلِكِیْنَ ۟

Qaaloo tallaahi tafta'u tazkuru Yoosufa hattaa takoona haradan aw takoona minal haalikeen

“They said: "By Allah! (never) wilt thou cease to remember Joseph until thou reach the last extremity of illness, or until thou die!"”

Quran 12:85 (Yusuf Ali Translation)