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

(71) Say: If I err, I err only to my own loss, and if I am rightly guided it is because of that which my Lord hath revealed unto me. Lo! He is Hearer, Nigh.

(72) Couldst thou but see when they are terrified with no escape, and are seized from near at hand,

(73) Then truly I should be in error manifest.

(74) And when it is said unto them: Spend of that wherewith Allah hath provided you, those who disbelieve say unto those who believe: Shall we feed those whom Allah, if He willed, would feed? Ye are in naught else than error manifest.

(75) (And again of their falsehood): He hath preferred daughters to sons.

(76) And he said: Lo! I have preferred the good things (of the world) to the remembrance of my Lord; till they were taken out of sight behind the curtain.

(77) Is he whose bosom Allah hath expanded for Al-Islam, so that he followeth a light from his Lord, (as he who disbelieveth)? Then woe unto those whose hearts are hardened against remembrance of Allah. Such are in plain error.

(78) Lo! (on that day) those who disbelieve are informed by proclamation: Verily Allah's abhorrence is more terrible than your abhorrence one of another, when ye were called unto the faith but did refuse.

(79) And when he brought them the Truth from Our presence, they said: Slay the sons of those who believe with him, and spare their women. But the plot of disbelievers is in naught but error.

(80) And as for Thamud, We gave them guidance, but they preferred blindness to the guidance, so the bolt of the doom of humiliation overtook them because of what they used to earn.