By the sweat of your face, you shall get bread to eat,
until you return to the ground from which you were taken.
For you are dirt and to dirt you shall return.
This says nothing about eternal punishment or Hell. In the last part of Gen 3:21 God says
The man has become like one of us, knowing what is good and what is bad! Therefor, he must not be allowed to put out his hand to take fruit from the tree of life also and thus eat of it and live forever.
These two passages, if you believe the Bible is he word of God, clearly states that the punishment is to forego eternal life and that you die and become dirt, again there is nothing stated about eternal punishment.
There is another contradiction here. If eating from the tree makes you live forever “thus eat from it and live forever” Adam and Eve should live forever but God is punishing them by taking that possibility away.
The conclusion is clear. The punishment is: no eternal life but death, not eternal burning in Hell. The word “Hell” is a wrong translation for the original “Sheol” or “Hades” meaning “grave” and “forgetfulness” in the OT and in the NT “Gehenna” , also translated as Hell is actually an existing burning trash heap outside Jerusalem, which burned dead bodies. This trash heap burns all the time but the bodies were burned there for total destruction. (Biblegate.com/quicksearch, look up “Hell” in the “expanded Bible EXB”). I also recommend the book titled “Why You Won’t Go To Hell” available at Amazon.com
NOTE: You may use this post to answer any person who is declaring you are going to hell as a unbeliever.