If any one does not provide for his relatives, and especially for his own family, he has disowned the faith and is worse than an unbeliever.
1 Tim. 5:8
“Disowning,” obviously, connotes first owning something and then abandoning or repudiating it. So it’s implied that the person in question had faith and then lost it.
Some versions translate the word as “denied.” One could argue that this might apply to someone who never had faith. But in context, it’s clear Paul is writing to a community of believers, a church. He’s telling Timothy what the rules should be within the church.
And then, he’s “worse” than an unbeliever. This too implies that he was a believer before denying or disowning the faith. One who never believed can’t be worse than an unbeliever; he’s just an unbeliever. Only one who first believed and then stopped believing can be worse than an unbeliever. See also 2 Pet. 2:20.
What’s also interesting is that an action is the cause of the loss of faith. By not providing for his family, he denies the faith.