'Dejection' in the Bible

As for those who are left of you, I will bring despair (lack of courage, weakness) into their hearts in the lands of their enemies; the sound of a scattered leaf will put them to flight, and they will flee as if [running] from the sword, and will fall even when no one is chasing them.

Be miserable and grieve and weep [over your sin]. Let your [foolish] laughter be turned to mourning and your [reckless] joy to gloom.