'Careless' in the Bible

The sound of a carefree crowd was with her; and drunkards were brought from the wilderness with men of a common sort, who put bracelets on the hands of the women (both sisters) and beautiful crowns on their heads.

On that day [swift] messengers will go from Me in ships to frighten the careless and unsuspecting Ethiopians, and there will be anguish and trembling in them as in the day of [judgment for] Egypt; for behold, it is coming!”