19 Lamech married two wives, Adah and Zillah. 20 Adah gave birth to Jabal, the ancestor of all who live in tents and herd cattle. 21 His brother's name was Jubal, the ancestor of all who play the lyre and flute. 22 Zillah gave birth to Tubal-Cain, who worked at the forge making bronze and iron tools. Tubal-Cain's sister was Naamah.
23 Lamech said to his wives, Adah and Zillah, listen to me; you wives of Lamech, hear me out: I killed a man for wounding me, a young man who attacked me. 24 If Cain is avenged seven times, for Lamech it's seventy-seven!
25 Adam slept with his wife again. She had a son whom she named Seth. She said, "God has given me another child in place of Abel whom Cain killed." 26 And then Seth had a son whom he named Enosh. That's when men and women began praying and worshiping in the name of God.
Matthew Henry's Commentary on Genesis 4:19-28
Commentary on Genesis 4:19-24
(Read Genesis 4:19-24)
One of Cain's wicked race is the first recorded, as having broken the law of marriage. Hitherto, one man had but one wife at a time; but Lamech took two. Wordly things, are the only things that carnal, wicked people set their hearts upon, and are most clever and industrious about. So it was with this race of Cain. Here was a father of shepherds, and a father of musicians, but not a father of the faithful. Here is one to teach about brass and iron, but none to teach the good knowledge of the Lord: here are devices how to be rich, and how to be mighty, and how to be merry; but nothing of God, of his fear and service. Present things fill the heads of most. Lamech had enemies, whom he had provoked. He draws a comparison betwixt himself and his ancestor Cain; and flatters himself that he is much less criminal. He seems to abuse the patience of God in sparing Cain, into an encouragement to expect that he may sin unpunished.
Commentary on Genesis 4:25-26
(Read Genesis 4:25-26)
Our first parents were comforted in their affliction by the birth of a son, whom they called Seth, that is, 'set,' 'settled,' or 'placed;' in his seed mankind should continue to the end of time, and from him the Messiah should descend. While Cain, the head of the apostacy, is made a wanderer, Seth, from whom the true church was to come, is one fixed. In Christ and his church is the only true settlement. Seth walked in the steps of his martyred brother Abel; he was a partaker of like precious faith in the righteousness of our God and Saviour Jesus Christ, and so became a fresh witness of the grace and influence of God the Holy Spirit. God gave Adam and Eve to see the revival of religion in their family. The worshippers of God began to do more in religion; some, by an open profession of true religion, protested against the wickedness of the world around. The worse others are, the better we should be, and the more zealous. Then began the distinction between professors and profane, which has been kept up ever since, and will be, while the world stands.