'Unfit' in the Bible

Nor shall you offer as the food of your God any such [animals obtained] from a foreigner, because their corruption and blemish makes them unfit; there is a defect in them, they shall not be accepted for you.’”

Let the guilt fall on the head of Joab and on all his father’s house (family); and may there never disappear from the house of Joab one who suffers with a discharge or one who is a leper or one who walks with a crutch [being unfit for war], or one who falls by the sword, or one who lacks food.”

Do you not know that God's people will sit in judgement upon the world? And if you are the court before which the world is to be judged, are you unfit to deal with these petty matters?

But [like a boxer] I strictly discipline my body and make it my slave, so that, after I have preached [the gospel] to others, I myself will not somehow be disqualified [as unfit for service].

They profess to know God but with their deeds they deny him, since they are detestable, disobedient, and unfit for any good deed.