And of His signs is the creation of the heavens and earth and what He has dispersed throughout them of creatures. And He, for gathering them when He wills, is competent.
One of the signs of Allah that prove His power and oneness is the creation of the heavens and the creation of the earth, and the wondrous creations that He spread throughout them. He is able to bring them all together for the gathering and recompense whenever He wills. He is not incapable of doing this just as He was not incapable of creating them the first time.