His heart is as strong as a stone, hard as the lower crushing-stone.

The sin of Judah is engraved with an iron chisel on their stone-hard hearts. It is inscribed with a diamond point on the horns of their altars.

Like stone [the] waters become hard, and [the] faces of the deep freeze.

Who made the rock into a water-spring, and the hard stone into a fountain.

He set him up upon a high land, and he ate the increase of the fields. And he gave him honey to suck out of the rock, and oil out of the hard stone.

Is not my word like a fire, sayeth the LORD, and like a hammer that breaketh the hard stone?

Who can run with horses, or plow with oxen upon the hard rocks of stone? For why? Ye have turned true judgment into bitterness, and the fruit of righteousness into wormwood.