Wa in kaana kabura 'alaika i'raaduhum fa inistata'ta an tabtaghiya nafaqan fil ardi aw sullaman fis samaaa'i fataa tiyahum bi Aayah; wa law shaaa'al laahu lajama'ahum 'alal hudaa; falaa takoonanna minal jaahileen
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.