It is reported that Al-Hasan Al-Basrī (رحمه الله)
once
said during the funeral of a man:
May Allāh have mercy on the man who
works for the likes of this day; for today you are able to do what these
brothers of yours, the residents of these graves, cannot do. So make full use
of your health and free time before the day of distress and accounts comes upon
you.
{Ibn Abī Al-Dunyā, Dhamm Al-Dunyāarticle 53}