If the iron be blunt, and he do not whet the edge, then must he put to more strength: but wisdom is profitable to direct.

But all the Israelites went down to the Philistines, to sharpen every man his share, and his coulter, and his axe, and his mattock.

Iron sharpeneth iron; so a man sharpeneth the countenance of his friend.

If I whet my glittering sword, and mine hand take hold on judgment; I will render vengeance to mine enemies, and will reward them that hate me.

If he turn not, he will whet his sword; he hath bent his bow, and made it ready.

Son of man, prophesy, and say, Thus saith the LORD; Say, A sword, a sword is sharpened, and also furbished: It is sharpened to make a sore slaughter; it is furbished that it may glitter: should we then make mirth? it contemneth the rod of my son, as every tree.

Make bright the arrows; gather the shields: the LORD hath raised up the spirit of the kings of the Medes: for his device is against Babylon, to destroy it; because it is the vengeance of the LORD, the vengeance of his temple.

And he hath given it to be furbished, that it may be handled: this sword is sharpened, and it is furbished, to give it into the hand of the slayer.

It is sharpened to make a sore slaughter; it is furbished that it may glitter: should we then make mirth? it contemneth the rod of my son, as every tree.

Who whet their tongue like a sword, and bend their bows to shoot their arrows, even bitter words:

They have sharpened their tongues like a serpent; adders' poison is under their lips. Selah.