The word(s) "wall" appears 22 time(s) in 21 verse(s) in Quran in Mohsin Khan translation.

(11) "And throw that which is in your right hand! It will swallow up that which they have made. That which they have made is only a magician's trick, and the magician will never be successful, to whatever amount (of skill) he may attain."

(12) That they may witness things that are of benefit to them (i.e. reward of Hajj in the Hereafter, and also some worldly gain from trade), and mention the Name of Allah on appointed days (i.e. 10th, 11th, 12th, and 13th day of Dhul-Hijjah), over the beast of cattle that He has provided for them (for sacrifice), [at the time of their slaughtering by saying: (Bismillah, wallahu-Akbar, Allahumma Minka wa Ilaik).] Then eat thereof and feed therewith the poor having a hard time.

(13) Then Musa (Moses) threw his stick, and behold, it swallowed up all that they falsely showed!

(14) So We caused the earth to swallow him and his dwelling place. Then he had no group or party to help him against Allah, nor was he one of those who could save themselves.

(15) And those who had desired (for a position like) his position the day before, began to say: "Know you not that it is Allah Who enlarges the provision or restricts it to whomsoever He pleases of His slaves. Had it not been that Allah was Gracious to us, He could have caused the earth to swallow us up (also)! Know you not that the disbelievers will never be successful.

(16) So We punished each (of them) for his sins; of them were some on whom We sent Hasib (a violent wind with shower of stones) [as on the people of Lut (Lot)], and of them were some who were overtaken by As-Saihah [torment - awful cry. (as Thamud or Shu'aib's people)], and of them were some whom We caused the earth to swallow [as Qarun (Korah)], and of them were some whom We drowned [as the people of Nuh (Noah), or Fir'aun (Pharaoh) and his people]. It was not Allah Who wronged them, but they wronged themselves.

(17) Then a (big) fish swallowed him as he had done an act worthy of blame.

(18) And has the news of the litigants reached you? When they climbed over the wall into (his) Mihrab (a praying place or a private room);

(19) On the Day when the hypocrites - men and women - will say to the believers: "Wait for us! Let us get something from your light!" It will be said: "Go back to your rear! Then seek a light!" So a wall will be put up between them, with a gate therein. Inside it will be mercy, and outside it will be torment."

(20) They fight not against you even together, except in fortified townships, or from behind walls. Their enmity among themselves is very great. You would think they were united, but their hearts are divided. That is because they are a people who understand not.