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

(421) Such is the chastisement, and certainly the chastisement of the hereafter is greater, did they but know!

(422) Were it not that favor from his Lord had overtaken him, he would certainly have been cast down upon the naked Found while he was blamed.

(423) We would certainly have seized him by the right hand,

(424) Then We would certainly have cut off his aorta.

(425) And most surely it is the true certainty

(426) But nay! I swear by the Lord of the Easts and the Wests that We are certainly able

(427) And that if they should keep to the (right) way, We would certainly give them to drink of abundant water,

(428) And We have not made the wardens of the fire others than angels, and We have not made their number but as a trial for those who disbelieve, that those who have been given the book may be certain and those who believe may increase in faith, and those who have been given the book and the believers may not doubt, and that those in whose hearts is a disease and the unbelievers may say: What does Allah mean by this parable? Thus does Allah make err whom He pleases, and He guides whom He pleases, and none knows the hosts of your Lord but He Himself; and this is naught but a reminder to the mortals.

(429) That you shall most certainly enter one state after another.

(430) certainly We have created man to be in distress.