Exodus 9:7
And Pharaoh sent, and lo! there had not died of the cattle of Israel, so much as one. But Pharaoh's heart became dull, and he did not let the people go.
Exodus 7:14
Then said Yahweh unto Moses, Dull, is the heart of Pharaoh, - he hath refused to let the people go.
Exodus 8:32
And Pharaoh made his heart dull, this time also, - and did not let the people go.
Exodus 9:12
But Yahweh let the heart of Pharaoh wax bold, and he hearkened not unto them, - as spake Yahweh unto Moses.
Job 9:4
Wise in heart, and alert in vigour, What man hath hardened himself against him, and prospered!
Proverbs 29:1
He that being often reproved stiffeneth his neck, suddenly shall be hurt, and there be no healing.
Isaiah 48:4
Because I knew that - Obstinate, thou wast, - And, a sinew of iron, was thy neck, And thy brow, brazen,
Daniel 5:20
But, when uplifted was his heart and, his spirit, became obstinate so as to act arrogantly, he was put down from the throne of his kingdom, and, his dignity, took they from him;
Romans 9:18
Hence, then, - on whom he pleaseth, he hath mercy, and, whom he pleaseth, he doth harden.