In the series of ‘historical’ books that begin with the creation of the world and end with the destruction of the tiny kingdom of Judah in the sixth century BCE (the final chs. of 2 Kings) we are reminded how the persons all connect to that one first human being created by the Highest Elohim.
This 5th chapter of the first Book of Moses, begins with a reiteration of the creation of man in (or, “as”) the likeness (“resemblance,” a synonym of “image”; cf. 1:26-27) of God. It is about a similitude between the creature and his Almighty Creator, Who can not be seen by man, but felt. The personal, masculine ” him” used in the first chapter denotes man who is in the image of God, the plural “them” is a development from the original man, as explained in chapter 2. We are also told there are two sexes, a male and a female, but the female is not spoken of in this chapter.
And Elohim created the man in His image, in the image of Elohim He created him – male and female He created them. And Elohim blessed them, and Elohim said to them, “Be fruitful and increase, and fill the earth and subdue it, and rule over the fish of the sea, and over the birds of the heavens, and over all creeping creatures on the earth.”
(Gen 1:27-28 TS2009)
This is the book of the generations of Adam. In the day that Elohim created man, in the likeness of Elohim made he him;
(Gen 5:1 IAV)
God had two main purposes in creation: first, that it should reflect His glory; and second, that the whole earth should be filled with this glory. The filling of the earth shall pass by the woman, who because her act of obedience shall suffer pain being with child and bringing it on the world.
One cannot miss the emphasis on the blessing of the image (He blessed them) at Creation. But with that in mind the chapter then traces the result of sin, death. The blessing existed also in the fact that they could reproduce and make new human beings themselves. It was the Divine Creator Who gave them the power to reproduce, creating ongoing blessing for themselves in the form of many, many sons and daughters. Remember that they themselves were created, not born; so the ability to reproduce was a divine blessing.
Male and female created he them; and blessed them, and called their name Adam, in the day when they were created.
(Gen 5:2 IAV)
For the children of Adam and Eve, it is not said how long Cain lived or how old he was when his son Enoch was born. Abel left no “generations” and therefore his name was wiped out, Cain’s would be too, in the Flood. So they not being mentioned further; the generations through which human life continued were those of Seth, whom Adam got when he was already 130 years.
And Adam lived an hundred and thirty years, and begat a son in his own likeness, and after his image; and called his name Shet: And the days of Adam after he had begotten Shet were eight hundred years: and he begat sons and daughters: And all the days that Adam lived were nine hundred and thirty years: and he died.
(Gen 5:3-5 IAV)