'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.”

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 [to recognize and be acquainted with Him], but by their actions they deny and disown Him. They are detestable and disobedient and worthless for good work of any kind.