The word(s) "fault" appears 26 time(s) in 25 verse(s) in Quran in Abdullah Yusuf Ali translation.

(21) "O our people, hearken to the one who invites (you) to Allah, and believe in him: He will forgive you your faults, and deliver you from a Penalty Grievous.

(22) Know, therefore, that there is no god but Allah, and ask forgiveness for thy fault, and for the men and women who believe: for Allah knows how ye move about and how ye dwell in your homes.

(23) That Allah may forgive thee thy faults of the past and those to follow; fulfil His favour to thee; and guide thee on the Straight Way;

(24) Those who avoid great sins and shameful deeds, only (falling into) small faults,- verily thy Lord is ample in forgiveness. He knows you well when He brings you out of the earth, And when ye are hidden in your mothers' wombs. Therefore justify not yourselves: He knows best who it is that guards against evil.

(25) O ye who believe! Truly, among your wives and your children are (some that are) enemies to yourselves: so beware of them! But if ye forgive and overlook, and cover up (their faults), verily Allah is Oft-Forgiving, Most Merciful.