English of Core Text: Rav Yehudah son of Rav Chiyya said: Exile atones for half the iniquity. At first it is written “I shall be a fugitive and a wanderer,” and at the end it is written “and he settled in the land of Nod.”
On the daf / in context: The change from “na va-nad” to settled residence in “Nod” is taken as evidence that the exile itself effected partial atonement.
Type of Learning: Custom (exile atones for half)What Is Learned: Exile atones for half of a sin; Kayin’s transition from wandering to settling illustrates the point.