The word(s) "failed" appears 4 time(s) in 4 verse(s) in Quran in Muhammad Habib Shakir translation.

(1) Except those of the idolaters with whom you made an agreement, then they have not failed you in anything and have not backed up any one against you, so fulfill their agreement to the end of their term; surely Allah loves those who are careful (of their duty).

(2) So He made hypocrisy to follow as a consequence into their hearts till the day when they shall meet Him because they failed to perform towards Allah what they had promised with Him and because they told lies.

(3) And the Shaitan shall say after the affair is decided: Surely Allah promised you the promise of truth, and I gave you promises, then failed to keep them to you, and I had no authority over you, except that I called you and you obeyed me, therefore do not blame me but blame yourselves: I cannot be your aider (now) nor can you be my aiders; surely I disbelieved in your associating me with Allah before; surely it is the unjust that shall have the painful punishment.

(4) Both these gardens yielded their fruits, and failed not aught thereof, and We caused a river to gush forth in their midst,