A.T. Robertson Commentary 1 Timothy 5:8

"But if any provideth not for his own, and specially his own household, he hath denied the faith, and is worse than an unbeliever." — 1 Timothy 5:8 (ASV)

Provideth not for his own (των ιδιων ου προνοε). Condition of first class with ε and present active (or middle προνοειτα) indicative of προνοεω, old verb, to think beforehand. Pauline word in N.T. only here, 2 Corinthians 8:21; Romans 12:7. With genitive case.

He hath denied the faith (την πιστιν ηρνητα). Perfect middle indicative of old verb αρνεομα. His act of impiety belies (Titus 1:16) his claim to the faith (Revelation 2:13).

Worse than an unbeliever (απιστου χειρων). Ablative case of απιστου after the comparative χειρων. Who makes no profession of piety.