“He directs the affair from heaven to earth; then it ascends to Him in a day whose measure is a thousand years of those which you count.” (5)
“He directs the affair”: that is, He determines all matters and sends down the divine decree and predestination “from heaven to earth.” It was also said: He sends down revelation with Gabriel from heaven to earth. “Then it ascends”—that is, it rises—“to Him”: Gabriel ascends with the command, “in a day whose measure is a thousand years of those which you count.” That is, in one day of the days of this world, covering the distance of a thousand years’ journey: five hundred years for its descent and five hundred for its ascent, since the distance between heaven and earth is five hundred years. In other words, if one of the children of Adam were to travel it, he could traverse it only in a thousand years, whereas the angels traverse it in a single day.
This concerns the description of an angel’s ascent from the earth to heaven. As for His words, “The angels and the Spirit ascend to Him in a day whose measure is fifty thousand years” (al-Ma‘arij 4), this refers to the distance between the earth and the Lote Tree of the Furthest Boundary, which is Gabriel’s station. Gabriel and the angels with him, from among those belonging to his station, traverse a distance of fifty thousand years in one day of the days of this world. This is the full sense of the statement of Mujahid and al-Dahhak (1). His words, “to Him,” mean: to Allah. It was also said, according to this interpretation, that it means: to the place of the angel whom Allah, exalted is He, commanded to ascend to it.
Some said that the thousand years [and fifty thousand] (2) years are all on the Day of Resurrection, being longer for some and shorter for others. Its meaning is: He directs the affair from heaven to earth throughout the days of this world; then it ascends—that is, the affair and its governance return to Him after the passing away of the world and the cessation of the authority of rulers and the judgments of judges—on a day whose measure is a thousand years, namely the Day of Resurrection. As for His words, “fifty thousand years,” this refers to the disbeliever: Allah will make that day equivalent to fifty thousand years for him, while for the believer it will be less than that. Indeed, it is related in the hadith: “For the believer, it will be like the duration of an obligatory prayer which he performed in this world.” (3) Ibrahim al-Taymi said: “For the believer, it will be no more than the time between noon and mid-afternoon.” (4)