GEN519 By repenting, the majority of his transgression was forgiven, the main [portions] of his punishment were removed, and he escaped death.  What remained for him was the punishment of exile, as the verse says Genesis 4:16 “He settled in the land of exile to the east of Eden.”  Our sages, z”l, said Leviticus Rabbah 10:5 that even the punishment of nomadic existence was lightened after his repentance; before this, the decree of nomadic existence was double, as the verse Genesis 4:14 says, “I will become a wanderer and an exile on earth” – the nomadic existence was referred to twice. (“wanderer” and “exile.”  Yet subsequent to the repentance the verse says Genesis 4:16, “He settled in the land of exile.”  (only “exile” remained).  GATES 451-3