4:19 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.

Genesis 4:19 Parallel Commentaries

How the Kindly-Disposed and the Envious are to be Admonished.
(Admonition 11.) Differently to be admonished are the kindly-disposed and the envious. For the kindly-disposed are to be admonished so to rejoice in what is good in others as to desire to have the like as their own; so to praise with affection the deeds of their neighbours as also to multiply them by imitation, lest in this stadium of the present life they assist at the contest of others as eager backers, but inert spectators, and remain without a prize after the contest, in that they toiled not …
Leo the Great—Writings of Leo the Great

Epistle cxxii. To Rechared, King of the visigoths .
To Rechared, King of the Visigoths [82] . Gregory to Rechared, &c. I cannot express in words, most excellent son, how much I am delighted with thy work and thy life. For on hearing of the power of a new miracle in our days, to wit that the whole nation of the Goths has through thy Excellency been brought over from the error of Arian heresy to the firmness of a right faith, one is disposed to exclaim with the prophet, This is the change wrought by the right hand of the Most High (Ps. lxxvi. 11 [83] …
Saint Gregory the Great—the Epistles of Saint Gregory the Great

The Growth of the Old Testament Prophetic Histories
[Sidenote: Analogies between the influences that produced the two Testaments] Very similar influences were at work in producing and shaping both the Old and the New Testaments; only in the history of the older Scriptures still other forces can be distinguished. Moreover, the Old Testament contains a much greater variety of literature. It is also significant that, while some of the New Testament books began to be canonized less than a century after they were written, there is clear evidence that …
Charles Foster Kent—The Origin & Permanent Value of the Old Testament