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

(101) And whoever does not accept the-Divine caller, he shall not escape in the earth and he shall not have guardians besides Him, these are in manifest error.

(102) His companion will say: Our Lord! I did not lead him into inordinacy but he himself was in a great error.

(103) Leave them then till they meet that day of theirs wherein they shall be made to swoon (with terror):

(104) Your companion does not err, nor does he go astray;

(105) So they said: What! a single mortal from among us! Shall we follow him? Most surely we shall in that case be in sure error and distress:

(106) Surely the guilty are in error and distress.

(107) Then shall you, O you who err and call it a lie!

(108) And if he is one of the rejecters, the erring ones,

(109) He it is Who caused those who disbelieved of the followers of the Book to go forth from their homes at the first banishment you did not think that they would go forth, while they were certain that their fortresses would defend them against Allah; but Allah came to them whence they did not expect, and cast terror into their hearts; they demolished their houses with their own hands and the hands of the believers; therefore take a lesson, O you who have eyes!

(110) He it is Who raised among the inhabitants of Mecca an Apostle from among themselves, who recites to them His communications and purifies them, and teaches them the Book and the Wisdom, although they were before certainly in clear error,