In Islam, the punishment for leaving the religion is death.

The finding

What the evidence shows

All four Sunni legal schools and Shia jurisprudence classically hold that apostasy is punishable by death, so the claim reflects the traditional, majority legal position accurately. But stating it as simply how Islam works skips over real diversity today, many modern scholars reject the death penalty for apostasy, groups like the Ahmadiyya explicitly reject any earthly punishment, and most Muslim majority countries do not legally enforce execution for leaving the faith.