Hi- I'm neither a language expert nor have I great knowledge of bible texts . I've read the source text you gave the link to.
Then I picked up my old 1951 Dutch translation of Genesis, that gives only this:
(excuse crude translation in English)
After God has refused the sacrifice.
"And the Lord said to Cain: Why are you displeased and why is you face clouded? Might you not lift it up, if you act right?
But if you do not act right, sin lies waiting at the door and wants to get hold of you, though you must master it.
But Cain said to his brother Abel: (Let us go onto the field)
When now they were in the field, Cain stood up against his brother Abel and killed him."
Then God curses him and tells him he will be a fugitive and wanderer upon this earth. Then Cain says that his crime is too heavy to bear the punishment and God gives him the Cain's sign as a protection and he goes to the land Nod, East of Eeden.
Seems very plain compared to that source text.
