ייִדישער מחשבֿה אויף יחזקאל 33:16

Likewise, a baal teshuva (penitent) who wasted most of his life in things other than the service of G-d, if he repents at the end of his days, the Creator will forgive him for all of what happened of the bad deeds of all of his previous days, as written: "None of his transgressions that he had committed shall be remembered against him; [for his righteousness that he had done he shall live]" (Yechezkel 18:22), and "None of his sins that he had committed shall be remembered against him; [he performed justice and righteousness; he shall surely live]"(Yechezkel 33:16).