The word(s) "err" appears 126 time(s) in 119 verse(s) in Quran in Muhammad Habib Shakir translation.

(31) Whomsoever Allah guides, he is the one who follows the right way; and whomsoever He causes to err, these are the losers.

(32) And certainly We have created for hell many of the jinn and the men; they have hearts with which they do not understand, and they have eyes with which they do not see, and they have ears with which they do not hear; they are as cattle, nay, they are in worse errors; these are the heedless ones.

(33) Whomsoever Allah causes to err, there is no guide for him; and He leaves them alone in their inordinacy, blindly wandering on.

(34) And their brethren increase them in error, then they cease not.

(35) When your Lord revealed to the angels: I am with you, therefore make firm those who believe. I will cast terror into the hearts of those who disbelieve. Therefore strike off their heads and strike off every fingertip of them.

(36) This is because Allah has never changed a favor which He has conferred upon a people until they change their own condition; and because Allah is Hearing, Knowing;

(37) They preferred to be with those who remained behind, and a seal is set on their hearts so they do not understand.

(38) This then is Allah, your true Lord; and what is there after the truth but error; how are you then turned back?

(39) When they said: Certainly Yusuf and his brother are dearer to our father than we, though we are a (stronger) company; most surely our father is in manifest error:

(40) And women in the city said: The chiefs wife seeks her slave to yield himself (to her), surely he has affected her deeply with (his) love; most surely we see her in manifest error.