The word(s) "certain" appears 498 time(s) in 437 verse(s) in Quran in Muhammad Habib Shakir translation.

(71) Say: To whom belongs what is in the heavens and the earth? Say: To Allah; He has ordained mercy on Himself; most certainly He will gather you on the resurrection day-- there is no doubt about it. (As for) those who have lost their souls, they will not believe.

(72) Nay, what they concealed before shall become manifest to them; and if they were sent back, they would certainly go back to that which they are forbidden, and most surely they are liars.

(73) And this world's life is naught but a play and an idle sport and certainly the abode of the hereafter is better for those who guard (against evil); do you not then understand?

(74) We know indeed that what they say certainly grieves you, but surely they do not call you a liar; but the unjust deny the communications of Allah.

(75) And certainly apostles before you were rejected, but they were patient on being rejected and persecuted until Our help came to them; and there is none to change the words of Allah, and certainly there has come to you some information about the apostles.

(76) And if their turning away is hard on you, then if you can seek an opening (to go down) into the earth or a ladder (to ascend up) to heaven so that you should bring them a sign and if Allah had pleased He would certainly have gathered them all on guidance, therefore be not of the ignorant.

(77) And certainly We sent (apostles) to nations before you then We seized them with distress and affliction in order that they might humble themselves.

(78) Say: If that which you desire to hasten were with me, the matter would have certainly been decided between you and me; and Allah best knows the unjust.

(79) Say: Who is it that delivers you from the dangers of the land and the sea (when) you call upon Him (openly) humiliating yourselves, and in secret: If He delivers us from this, we should certainly be of the grateful ones.

(80) Then when he saw the moon rising, he said: Is this my Lord? So when it set, he said: If my Lord had not guided me I should certainly be of the erring people.