'Useless' in the Bible

Then all the corrupt and useless men among the men who went with David reacted and said, "Because they did not go with us, we will not give them [anything] from the plunder which we recovered, {except} each [man may take] his own wife and children. They must take them along and go!"

I hate those devoted to useless idols, but I trust Yahweh.

You have said, '[It is] useless to serve God! What [is the] gain if we keep his requirements, and if we walk as mourners {before} Yahweh of hosts?

and not to pay attention to myths and endless genealogies, which cause useless speculations rather than God's plan [that is] by faith.

But avoid foolish controversies and genealogies and contentions and quarrels about the law, for they are useless and fruitless.

Once he [was] useless to you, but now [he is] useful to you and to me,

But do you want to know, O foolish person, that faith apart from works is useless?

For [if] these [things] are yours and are increasing, this does not make [you] useless or unproductive in the knowledge of our Lord Jesus Christ.