Scripture does teach us what is right and wrong (2 Timothy 3:16). But the Bible is also the history of people and a nation. It records wars, murder, rape, incest, and a host of other tragic events but does not in every case specifically point out the error and sin. It does, however, in most cases, explain the negative consequences of these actions.
Lamech, the seventh from Adam in the line of Cain, is the first recorded polygamist. His life, however, was marked by murder, rebellion, and defiance. It is clear Lamech was not honoring God’s design for marriage as stated in Genesis 2:24. Later God would record his views on the importance of men being married to one woman (the wife of their youth) in Proverbs 5:18-19, Malachi 2:14-15, Mark 10:2-8, and 1 Corinthians 7:2-10.