'Impenitent' in the Bible

All the people and the tax collectors who heard Jesus, acknowledged [the validity of] God’s justice, having been baptized with the baptism of John.

But after thy hardness and impenitent heart treasurest up unto thyself wrath against the day of wrath and revelation of the righteous judgment of God;

and to [look forward and confidently] wait for [the coming of] His Son from heaven, whom He raised from the dead—Jesus, who [personally] rescues us from the coming wrath [and draws us to Himself, granting us all the privileges and rewards of a new life with Him].