The word(s) "forget" appears 26 time(s) in 26 verse(s) in Quran in Muhammad Pickthal translation.

(11) And he said unto him of the twain who he knew would be released: Mention me in the presence of thy lord. But Satan caused him to forget to mention it to his lord, so he (Joseph) stayed in prison for some years.

(12) Except if Allah will. And remember thy Lord when thou forgettest, and say: It may be that my Lord guideth me unto a nearer way of truth than this.

(13) And who doth greater wrong than he who hath been reminded of the revelations of his Lord, yet turneth away from them and forgetteth what his hands send forward (to the Judgment)? Lo! on their hearts We have placed coverings so that they understand not, and in their ears a deafness. And though thou call them to the guidance, in that case they can never be led aright.

(14) He said: Didst thou see, when we took refuge on the rock, and I forgot the fish - and none but Satan caused me to forget to mention it - it took its way into the waters by a marvel.

(15) We (angels) come not down save by commandment of thy Lord. Unto Him belongeth all that is before us and all that is behind us and all that is between those two, and thy Lord was never forgetful -

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

(17) He will say: So (it must be). Our revelations came unto thee but thou didst forget them. In like manner thou art forgotten this Day.

(18) And the True Promise draweth nigh; then behold them, staring wide (in terror), the eyes of those who disbelieve! (They say): Alas for us! We (lived) in forgetfulness of this. Ah, but we were wrong-doers!

(19) On the day when ye behold it, every nursing mother will forget her nursling and every pregnant one will be delivered of her burden, and thou (Muhammad) wilt see mankind as drunken, yet they will not be drunken, but the Doom of Allah will be strong (upon them).

(20) But ye chose them for a laughing-stock until they caused you to forget remembrance of Me, while ye laughed at them.