Source: Mishnah Sanhedrin 6:2; Talmud Bavli Sanhedrin 43b, 47b; Yoma 86b; Maimonides, Hilchot Sanhedrin 13:1.

Mishnah Sanhedrin 6:2: before execution, condemned persons are told ‘Confess your sin, for all who confess have a share in the World to Come.’ Death accepted with confession = complete atonement. Yoma 86b establishes a hierarchy: teshuvah atones for minor sins; Yom Kippur for serious ones; death for the gravest. The deathbed vidui prayer asks that one’s death ‘be an atonement for all my sins.’ Death is not merely biological but spiritually redemptive when approached with awareness.