While lazy days could be a problem, I think it’s okay to have a lazy day or a day of rest without feeling unproductive. Because when God created the world, He gave us a rest day, known as the Sabbath Day.
But I think the problem may arise when we have too many lazy or idle days. These are the kind of days that the Bible speaks against.
Having Too Many Lazy Days Leads To This:
The lazy man buries his hand in the bowl; It wearies him to bring it back to his mouth. Proverbs 26:15
The lazy man is wiser in his own eyes than seven men who can answer sensibly. Proverbs 26:16