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

(1) And if their turning away is hard on you, then if you can seek an opening (to go down) into the earth or a ladder (to ascend up) to heaven so that you should bring them a sign and if Allah had pleased He would certainly have gathered them all on guidance, therefore be not of the ignorant.

(2) And enter your hand into the opening of your bosom, it shall come forth white without evil; among nine signs to Firon and his people, surely they are a transgressing people.

(3) Enter your hand into the opening of your bosom, it will come forth white without evil, and draw your hand to yourself to ward off fear: so these two shall be two arguments from your Lord to Firon and his chiefs, surely they are a transgressing people.

(4) And the heaven shall be opened so that it shall be all openings,