The word(s) "warned" appears 14 time(s) in 14 verse(s) in Quran in Muhammad Habib Shakir translation.

(11) We did not create the heavens and the earth and what is between them two save with truth and (for) an appointed term; and those who disbelieve turn aside from what they are warned of.

(12) And mention the brother of Ad; when he warned his people in the sandy plains,-- and indeed warners came before him and after him-- saying Serve none but Allah; surely I fear for you the punishment of a grievous day.

(13) And certainly he warned them of Our violent seizure, but they obstinately disputed the warning.

(14) Surely We have warned you of a chastisement near at hand: the day when man shall see what his two hands have sent before, and the unbeliever shall say: O! would that I were dust!