'Knives' in the Bible

At that time the Lord said to Joshua, “Make for yourself flint knives and circumcise again the sons of Israel the second time.”

So Joshua made himself flint knives and circumcised the sons of Israel at Gibeath-haaraloth.

There is a kind of man whose teeth are like swordsAnd his jaw teeth like knives,To devour the afflicted from the earthAnd the needy from among men.

For before the harvest, as soon as the bud blossomsAnd the flower becomes a ripening grape,Then He will cut off the sprigs with pruning knivesAnd remove and cut away the spreading branches.