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

(261) And they swear by Allah with the most energetic of their oaths that if you command them they would certainly go forth. Say: Swear not; reasonable obedience (is desired); surely Allah is aware of what you do.

(262) Allah has promised to those of you who believe and do good that He will most certainly make them rulers in the earth as He made rulers those before them, and that He will most certainly establish for them their religion which He has chosen for them, and that He will most certainly, after their fear, give them security in exchange; they shall serve Me, not associating aught with Me; and whoever is ungrateful after this, these it is who are the. transgressors.

(263) Think not that those who disbelieve shall escape in the earth, and their abode is the fire; and certainly evil is the resort!

(264) And those who do not hope for Our meeting, say: Why have not angels been sent down upon us, or (why) do we not see our Lord? Now certainly they are too proud of themselves and have revolted in great revolt.

(265) certainly he led me astray from the reminder after it had come to me; and the Shaitan fails to aid man.

(266) And certainly We gave Musa the Book and We appointed with him his brother Haroun an aider.

(267) And certainly they have (often) passed by the town on which was rained an evil rain; did they not then see it? Nay! they did not hope to be raised again.

(268) Have you not considered (the work of) your Lord, how He extends the shade? And if He had pleased He would certainly have made it stationary; then We have made the sun an indication of it

(269) And certainly We have repeated this to them that they may be mindful, but the greater number of men do not consent to aught except denying.

(270) And if We had pleased We would certainly have raised a warner in every town.