'Knives' in the Bible

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.

And this is their number: dishes of gold thirty, dishes of silver a thousand, knives nine and twenty,

A generation -- swords are their teeth, And knives -- their jaw-teeth, To consume the poor from earth, And the needy from among men.