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

(111) He it is Who created you from a single being, and of the same (kind) did He make his mate, that he might incline to her; so when he covers her she bears a light burden, then moves about with it; but when it grows heavy, they both call upon Allah, their Lord: If Thou givest us a good one, we shall certainly be of the grateful ones.

(112) When you were on the nearer side (of the valley) and they were on the farthest side, while the caravan was in a lower place than you; and if you had mutually made an appointment, you would certainly have broken away from the appointment, but-- in order that Allah might bring about a matter which was to be done, that he who would perish might perish by clear proof, and he who would live might live by clear proof; and most surely Allah is Hearing, Knowing;

(113) When Allah showed them to you in your dream as few; and if He had shown them to you as many you would certainly have become weak-hearted and you would have disputed about the matter, but Allah saved (you); surely He is the Knower of what is in the breasts.

(114) certainly Allah helped you in many battlefields and on the day of Hunain, when your great numbers made you vain, but they availed you nothing and the earth became strait to you notwithstanding its spaciousness, then you turned back retreating.

(115) If you will not aid him, Allah certainly aided him when those who disbelieved expelled him, he being the second of the two, when they were both in the cave, when he said to his companion: Grieve not, surely Allah is with us. So Allah sent down His tranquillity upon him and strengthened him with hosts which you did not see, and made lowest the word of those who disbelieved; and the word of Allah, that is the highest; and Allah is Mighty, Wise.

(116) Had it been a near advantage and a short journey, they would certainly have followed you, but the tedious journey was too long for them; and they swear by Allah: If we had been able, we would certainly have gone forth with you; they cause their own souls to perish, and Allah knows that they are most surely

(117) And if they had intended to go forth, they would certainly have provided equipment for it, but Allah did not like their going forth, so He withheld them, and it was said (to them): Hold back with those who hold back.

(118) Had they gone forth with you, they would not have added to you aught save corruption, and they would certainly have hurried about among you seeking (to sow) dissension among you, and among you there are those who hearken for their sake; and Allah knows the unjust.

(119) certainly they sought (to sow) dissension before, and they meditated plots against you until the truth came, and Allah's commandment prevailed although they were averse (from it).

(120) If they could find a refuge or cave or a place to enter into, they would certainly have turned thereto, running away in all haste.