'Stiffness' in the Bible

be mindful of Thy servants, of Abraham, of Isaac, and of Jacob, turn not unto the stiffness of this people, and unto its wickedness, and unto its sin;

He saith to them -- 'Moses for your stiffness of heart did suffer you to put away your wives, but from the beginning it hath not been so.

And Jesus answering said to them, 'For the stiffness of your heart he wrote you this command,

Afterwards, as they are reclining (at meat), he was manifested to the eleven, and did reproach their unbelief and stiffness of heart, because they believed not those having seen him being raised;