The word(s) "warn" appears 127 time(s) in 113 verse(s) in Quran in Muhammad Habib Shakir translation.

(31) And warn those who say: Allah has taken a son.

(32) And We do not send apostles but as givers of good news and warning, and those who disbelieve make a false contention that they may render null thereby the truth, and they take My communications and that with which they are warned for a mockery.

(33) And warn them of the day of intense regret, when the matter shall have been decided; and they are (now) in negligence and they do not believe.

(34) So We have only made it easy in your tongue that you may give good news thereby to those who guard (against evil) and warn thereby a vehemently contentious people.

(35) Say: I warn you only by revelation; and the deaf do not hear the call whenever they are warned.

(36) But if they turn back, say: I have given you warning in fairness and I do not know whether what you are threatened with is near or far;

(37) Say: O people! I am only a plain warner to you.

(38) Blessed is He Who sent down the Furqan upon His servant that he may be a warner to the nations;

(39) And they say: What is the matter with this Apostle that he eats food and goes about in the markets; why has not an angel been sent down to him, so that he should have been a warner with him?

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