What's the Punishment?

Kane says, unto the lord, my punishment is greater than i can bear. He essentially turns himself in eventually, because he can't tolerate what he's done so well. And now you're cursed from the earth which has opened her mouth to receive thy brother's blood from thy and when you till the ground, it will not henceforth yield unto you its strength. A fugitive and a vagabond shall thou be in the earth, you know....