And warn them, threaten, O Muhammad (s), the disbelievers of Mecca, of the Day of Regret, namely, the Day of Resurrection, on which the sinner will regret not having been virtuous in [the life of] this world, when the matter will be decided, for them thereupon, that they be chastised, while they, in this world, are [yet] heedless, of it, and do not believe, in it [the Day of Resurrection].