'Harden' in the Bible

and charge Jehoshua, and strengthen him, and harden him, for he doth pass over before this people, and he doth cause them to inherit the land which thou seest.

and ye have circumcised the foreskin of your heart, and your neck ye do not harden any more;

If there be among you a poor man of one of thy brethren within any of thy gates in thy land which the LORD thy God giveth thee, thou shalt not harden thine heart, nor shut thine hand from thy poor brother: