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

(41) He said: My Lord! Because Thou hast sent me astray, I verily shall adorn the path of error for them in the earth, and shall mislead them every one,

(42) And verily We have raised in every nation a messenger, (proclaiming): Serve Allah and shun false gods. Then some of them (there were) whom Allah guided, and some of them (there were) upon whom error had just hold. Do but travel in the land and see the nature of the consequence for the deniers!

(43) Whosoever goeth right, it is only for (the good of) his own soul that he goeth right, and whosoever erreth, erreth only to its hurt. No laden soul can bear another's load, We never punish until we have sent a messenger.

(44) And thy Lord is Best Aware of all who are in the heavens and the earth. And we preferred some of the prophets above others, and unto David We gave the Psalms.

(45) Verily we have honoured the Children of Adam. We carry them on the land and the sea, and have made provision of good things for them, and have preferred them above many of those whom We created with a marked preferment.

(46) See and hear them on the Day they come unto Us! yet the evil-doers are to-day in error manifest.

(47) Say: As for him who is in error, the Beneficent will verily prolong his span of life until, when they behold that which they were promised, whether it be punishment (in the world), or the Hour (of doom), they will know who is worse in position and who is weaker as an army.

(48) He said: The knowledge thereof is with my Lord in a Record. My Lord neither erreth nor forgetteth,

(49) The day when the Trumpet is blown. On that day we assemble the guilty white-eyed (with terror),

(50) He said: Verily ye and your fathers were in plain error.