Surah 40. Ghafir, Ayah 17

Swift in several senses; (1) the time of the present life or of the interval before Judgment. i.e., before the restoration of true values, is so short as compared to Eternity, that it may be counted as negligible: in the next verse the Day is characterised as "(ever) drawing near"; (2) in spite of the great concourse of souls to be judged, the process of Judgment will be almost instantaneous, "in the twinkling of an eye" (xvi. 77), because everything is already known to Allah; and yet not the least injustice will be done.