The word(s) "error" appears 50 time(s) in 50 verse(s) in Quran in Abdullah Yusuf Ali translation.

(21) Thou wouldst have deemed them awake, whilst they were asleep, and We turned them on their right and on their left sides: their dog stretching forth his two fore-legs on the threshold: if thou hadst come up on to them, thou wouldst have certainly turned back from them in flight, and wouldst certainly have been filled with terror of them.

(22) And the Book (of Deeds) will be placed (before you); and thou wilt see the sinful in great terror because of what is (recorded) therein; they will say, "Ah! woe to us! what a Book is this! It leaves out nothing small or great, but takes account thereof!" They will find all that they did, placed before them: And not one will thy Lord treat with injustice.

(23) How plainly will they see and hear, the Day that they will appear before Us! but the unjust today are in error manifest!

(24) The Day when the Trumpet will be sounded: that Day, We shall gather the sinful, blear-eyed (with terror).

(25) He said, "Indeed ye have been in manifest error - ye and your fathers."

(26) The Great Terror will bring them no grief: but the angels will meet them (with mutual greetings): "This is your Day,- (the Day) that ye were promised."

(27) Moses said: "I did it then, when I was in error.

(28) "'By Allah, we were truly in an error manifest,

(29) And the Day that the Trumpet will be sounded - then will be smitten with terror those who are in the heavens, and those who are on earth, except such as Allah will please (to exempt): and all shall come to His (Presence) as beings conscious of their lowliness.

(30) If any do good, good will (accrue) to them therefrom; and they will be secure from terror that Day.