The word(s) "err" appears 106 time(s) in 99 verse(s) in Quran in Muhammad Pickthal translation.

(31) Their brethren plunge them further into error and cease not.

(32) Such then is Allah, your rightful Lord. After the Truth what is there saving error? How then are ye turned away!

(33) Say: O mankind! Now hath the Truth from your Lord come unto you. So whosoever is guided, is guided only for (the good of) his soul, and whosoever erreth erreth only against it. And I am not a warder over you.

(34) When they said: Verily Joseph and his brother are dearer to our father than we are, many though we be. Lo! our father is in plain aberration.

(35) And women in the city said: The ruler's wife is asking of her slave-boy an ill-deed. Indeed he has smitten her to the heart with love. We behold her in plain aberration.

(36) So, When they despaired of (moving) him, they conferred together apart. The eldest of them said: Know ye not how your father took an undertaking from you in Allah's name and how ye failed in the case of Joseph aforetime? Therefore I shall not go forth from the land until my father giveth leave or Allah judgeth for me. He is the Best of Judges.

(37) They said: By Allah, verily Allah hath preferred thee above us, and we were indeed sinful.

(38) (Those around him) said: By Allah, lo! thou art in thine old aberration.

(39) And when Abraham said: My Lord! Make safe this territory, and preserve me and my sons from serving idols.

(40) Deem not that Allah is unaware of what the wicked do. He but giveth them a respite till a day when eyes will stare (in terror),