Strong's Greek #570
ἀπιστίας

Englishman's Concordance (References)

ἀπιστίας apistias — 1 Occurrence

Hebrews 3:12 - N-GFS
GRK:καρδία πονηρὰ ἀπιστίας ἐν τῷ
NAS: of you an evil, unbelieving heart
KJV: heart of unbelief, in
INT: a heart evil of unbelief in