The word(s) "portent" appears 104 time(s) in 94 verse(s) in Quran in Muhammad Pickthal translation.

(31) Have they not seen the birds obedient in mid-air? None holdeth them save Allah. Lo! herein, verily, are portents for a people who believe.

(32) And We appoint the night and the day two portents. Then We make dark the portent of the night, and We make the portent of the day sight-giving, that ye may seek bounty from your Lord, and that ye may know the computation of the years, and the reckoning; and everything have We expounded with a clear expounding.

(33) Naught hindereth Us from sending portents save that the folk of old denied them. And We gave Thamud the she-camel - a clear portent save to warn.

(34) He said: In truth thou knowest that none sent down these (portents) save the Lord of the heavens and the earth as proofs, and lo! (for my part) I deem thee lost, O Pharaoh.

(35) Or deemest thou that the People of the Cave and the Inscription are a wonder among Our portents?

(36) And thou mightest have seen the sun when it rose move away from their cave to the right, and when it set go past them on the left, and they were in the cleft thereof. That was (one) of the portents of Allah. He whom Allah guideth, he indeed is led aright, and he whom He sendeth astray, for him thou wilt not find a guiding friend.

(37) That We may show thee (some) of Our greater portents,

(38) (Saying): Eat ye and feed your cattle. Lo! herein verily are portents for men of thought.

(39) Nay, say they, (these are but) muddled dreams; nay, he hath but invented it; nay, he is but a poet. Let him bring us a portent even as those of old (who were Allah's messengers) were sent (with portents).

(40) Not a township believed of those which We destroyed before them (though We sent them portents): would they then believe?