impenitent

katumaton Not penitent; not repenting of sin; not contrite; of a hard heart.
Bishop Hall

A careless and impenitent heart.

“Captain Peleg,” said Bildad steadily, “thy conscience may be drawing ten inches of water, or ten fathoms, I can’t tell; but as thou art still an impenitent man, Captain Peleg, I greatly fear lest thy conscience be but a leaky one; and will in the end sink thee foundering down to the fiery pit, Captain Peleg.”