The word(s) "warner" appears 57 time(s) in 53 verse(s) in Quran in Muhammad Pickthal translation.

(31) Thou art but a warner.

(32) Lo! We have sent thee with the Truth, a bearer of glad tidings and a warner; and there is not a nation but a warner hath passed among them.

(33) And they cry for help there, (saying): Our Lord! Release us; we will do right, not (the wrong) that we used to do. Did not We grant you a life long enough for him who reflected to reflect therein? And the warner came unto you. Now taste (the flavour of your deeds), for evil-doers have no helper.

(34) And they swore by Allah, their most binding oath, that if a warner came unto them they would be more tractable than any of the nations; yet, when a warner came unto them it aroused in them naught save repugnance,

(35) And verily We sent among them warners.

(36) And they marvel that a warner from among themselves hath come unto them, and the disbelievers say: This is a wizard, a charlatan.

(37) Say (unto them, O Muhammad): I am only a warner, and there is no Allah save Allah, the One, the Absolute,

(38) It is revealed unto me only that I may be a plain warner.

(39) And even so We sent not a warner before thee (Muhammad) into any township but its luxurious ones said: Lo! we found our fathers following a religion, and we are following their footprints.

(40) (And the warner) said: What! Even though I bring you better guidance than that ye found your fathers following? They answered: Lo! in what ye bring we are disbelievers.