NT-EPISTLES.filter - strkjv hardness:

strkjv@Romans:2:5 @ But after thy hardness and impenitent heart treasurest up (5719) unto thyself wrath against the day of wrath and revelation of the righteous judgment of God;

strkjv@2Timothy:2:3 @ Thou therefore endure hardness (5657), as a good soldier of Jesus Christ.