Genesis 4:19 - Wesley's Explanatory Notes

And Lamech took 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. Jabal was a famous shepherd; he delighted much in keeping cattle, and was so happy in devising methods of doing it to the best advantage, and instructing others in them, that the shepherds of those times, nay, the shepherds of after — times, called him Father; or perhaps his children after him, being brought up to the same employment: the family was a family of shepherds. Jubal was a famous musician, and particularly an organist, and the first that gave rules for that noble art or science of music. When Jabal had set them in a way to be rich, Jubal put them in a way to be merry. From Jubal probably the Jubilee trumpet was so called; for the best music was that which proclaimed liberty and redemption.