The word(s) "unheard-of" appears 1 time(s) in 1 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) He said: "Whoever doth wrong, him shall we punish; then shall he be sent back to his Lord; and He will punish him with a punishment unheard-of (before).

(سورة الكهف, Al-Kahf, Chapter #18, Verse #87)
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