John Gills Exposition of the Bible Commentary - Genesis 4:18
And unto Enoch was born Irad ,.... But of neither of them is any other mention made, either in sacred or profane history; nor is it said how old Enoch was when Irad was born, nor how long he lived after; as is recorded of Adam, Seth, and their posterity: and Irad begat Mehujael, and Mehujael begat Methusael ; of whom also we have no other account: and Methusael begat Lamech ; and it seems for the sake of Lamech that the genealogy of Cain's posterity is described and carried... read more
Matthew Henry's Complete Commentary - Genesis 4:16-18
We have here a further account of Cain, and what became of him after he was rejected of God. I. He tamely submitted to that part of his sentence by which he was hidden from God's face; for (Gen. 4:16) he went out from the presence of the Lord, that is, he willingly renounced God and religion, and was content to forego its privileges, so that he might not be under its precepts. He forsook Adam's family and altar, and cast off all pretensions to the fear of God, and never came among good people,... read more