"And when the earth is extended," meaning it will be stretched like the stretching of tanned leather. This occurs when it is exchanged for a white earth, as if it were silver, upon which no sin has been committed.
﴿وَإِذا الأَرْض مدت﴾ تُمَدُّ مَدَّ الْأَدِيمِ، وَهَذَا إِذَا بُدِّلَتْ بِأَرْضٍ بَيْضَاءَ، كَأَنَّهَا فِضَّةٌ لم يعْمل عَلَيْهَا خَطِيئَة
