Rosh HaShanna

https://www.sefaria.org/Mishneh_Torah,_Repentance.3.3nyone who changes his mind about the mitzvot he has performed and regrets the merits [he has earned], saying in his heart: "What value was there in doing them? I wish I hadn't performed them" - loses them all and no merit is preserved for him at all as [Ezekiel 33:12] states "The righteousness of the upright will not save him on the day of his transgression." This only applies to one who regrets his previous [deeds].Just as a person's merits and sins are weighed at the time of his death, so, too, the sins of every inhabitant of the world together with his merits are weighed on the festival of Rosh HaShanah. If one is found righteous, his [verdict] is sealed for life. If one is found wicked, his [verdict] is sealed for death. A Beinoni's verdict remains tentative until Yom Kippur. If he repents, his [verdict] is sealed for life. If not, his [verdict] is sealed for death.

https://www.sefaria.org/Mishneh_Torah,_Repentance.3.3