'Flint' in the Bible

and Zipporah taketh a flint, and cutteth off the foreskin of her son, and causeth it to touch his feet, and saith, 'Surely a bridegroom of blood art thou to me;'

He maketh him ride on high places of earth, And he eateth increase of the fields, And He maketh him suck honey from a rock, And oil out of the flint of a rock;

At that time said Jehovah unto Joshua, 'Make for thee knives of flint, and turn back, circumcise the sons of Israel a second time;'

and Joshua maketh for him knives of flint, and circumciseth the sons of Israel at the height of the foreskins.

Against the flint he sent forth his hand, He overturned from the root mountains.

He is turning the rock to a pool of waters, The flint to a fountain of waters!

Whose arrows are sharp, and all its bows bent, Hoofs of its horses as flint have been reckoned, And its wheels as a hurricane!

And the Lord Jehovah giveth help to me, Therefore I have not been ashamed, Therefore I have set my face as a flint, And I know that I am not ashamed.