Serpent seed significant person Eve
And Adam knew Hava his wife, who had desired the Angel; and she conceived, and bare Kain; and she said, I have acquired a man, the Angel of the Lord.
So Adam knew his wife Eve/Hava, who desired the Angel (Samael), aka "The Serpent, Satan & The Destroyer" in Judaism & Talmudic Lore. And then she bore Kain. In one account Samael is also believed to be the father of Cain, as well as the partner of Lilith. The relationship between Samael and Lilith is depicted in the Sigil of Baphomet, the official insignia of the Church of Satan.