'Whet' in the Bible

You shall teach them diligently to your children [impressing God’s precepts on their minds and penetrating their hearts with His truths] and shall speak of them when you sit in your house and when you walk on the road and when you lie down and when you get up.

If I sharpen the lightning of My sword,And My hand takes hold of judgment,I will render vengeance on My adversaries,And I will repay those who hate Me.