Lamech takes two wives, and thus introduces polygamy. Measured by ch. 2:24 this appears as a sign of the deterioration from the original divinely ordained condition. “At least it was not regarded by the author as progress, for he represents Lamech as a rude uncultured man” (Knobel). The correctness of this statement is not to be contested on the ground that the author passes no judgment on the act.1 In ver. 23 also he has expressed no judgment, because every Israelitish reader would himself judge the deed related.
A. Dillmann, Genesis Critically and Exegetically Expounded, Vol. 1, trans. Wm. B. Stevenson (Edinburgh: T&T Clark, 1897), 199-200.