John Gills Exposition of the Bible Commentary - Genesis 4:19
And Lamech took unto him two wives ,.... He was the first we read of that introduced polygamy, contrary to the first institution of marriage, whereby only one man and one woman were to be joined together, and become one flesh, Genesis 2:24 . This evil practice, though it began in the race of wicked Cain, was in later ages followed by some among the people of God, which was connived at because of the hardness of their hearts; otherwise it was not so from the beginning. This was the first... read more
Matthew Henry's Complete Commentary - Genesis 4:19-22
We have here some particulars concerning Lamech, the seventh from Adam in the line of Cain. Observe, I. His marrying two wives. It was one of the degenerate race of Cain who first transgressed that original law of marriage that two only should be one flesh. Hitherto one man had but one wife at a time; but Lamech took two. From the beginning it was not so. Mal. 2:15; Matt. 19:5. See here, 1. Those who desert God's church and ordinances lay themselves open to all manner of temptation. 2. When a... read more