The word(s) "intelligent" appears 1 time(s) in 1 verse(s) in Quran in Mohsin Khan translation.

(1) And 'Ad and Thamud (people)! And indeed (their destruction) is clearly apparent to you from their (ruined) dwellings. Shaitan (Satan) made their deeds fair-seeming to them, and turned them away from the (Right) Path, though they were intelligent.

(سورة العنكبوت, Al-Ankaboot, Chapter #29, Verse #38)
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