The word(s) "wall" appears 19 time(s) in 19 verse(s) in Quran in Muhammad Pickthal translation.

(11) So We caused the earth to swallow him and his dwelling-place. Then he had no host to help him against Allah, nor was he of those who can save themselves.

(12) And morning found those who had coveted his place but yesterday crying: Ah, welladay! Allah enlargeth the provision for whom He will of His slaves and straiteneth it (for whom He will). If Allah had not been gracious unto us He would have caused it to swallow us (also). Ah, welladay! the disbelievers never prosper.

(13) So We took each one in his sin; of them was he on whom We sent a hurricane, and of them was he who was overtaken by the (Awful) Cry, and of them was he whom We caused the earth to swallow, and of them was he whom We drowned. It was not for Allah to wrong them, but they wronged themselves.

(14) Have they not observed what is before them and what is behind them of the sky and the earth? If We will, We can make the earth swallow them, or cause obliteration from the sky to fall on them. Lo! herein surely is a portent for every slave who turneth (to Allah) repentant.

(15) And the fish swallowed him while he was blameworthy;

(16) And hath the story of the litigants come unto thee? How they climbed the wall into the royal chamber;

(17) On the day when the hypocritical men and the hypocritical women will say unto those who believe: Look on us that we may borrow from your light! it will be said: Go back and seek for light! Then there will separate them a wall wherein is a gate, the inner side whereof containeth mercy, while the outer side thereof is toward the doom.

(18) They will not fight against you in a body save in fortified villages or from behind walls. Their adversity among themselves is very great. Ye think of them as a whole whereas their hearts are divers. That is because they are a folk who have no sense.

(19) Have ye taken security from Him Who is in the heaven that He will not cause the earth to swallow you when lo! it is convulsed?