Lamech’s other wife, Zillah, gave birth to a son named Tubal-cain. He became an expert in forging tools of bronze and iron. Tubal-cain had a sister named Naamah.
that is, all metals that do not burn—must be passed through fire in order to be made ceremonially pure. These metal objects must then be further purified with the water of purification. But everything that burns must be purified by the water alone.
Only the livestock and the treasures of the town were not destroyed, for the Israelites kept these as plunder for themselves, as the Lord had commanded Joshua.