If He Repents, the Legal Punishment is not Inflicted Upon the Apostate
Question :
Must the legal punishment be inflicted on the apostate if he committed a sin which entailed his apostasy in the past, then after that, he repented and returned to Allah, Most High? Must the legal punishment be imposed upon him because of his former apostasy which occurred at that time, bearing in mind that the apostasy occurred in a country where the Islamic Law is not implemented? Or is his repentance sufficient to wipe out the sin of apostasy and thus negate the implementation of the legal punishment?
Answer:
Whoever turned apostate from the religion of Islam and then returned to it in repentance, his repentance cancels what came before it. This is proved by the Book (of Allah) and the Sunnah.
Allah is the Granter of success. And may peace and blessings be upon our Prophet, Muhammad and upon his family and Companions.
Source:
The Permanent Committee
Fatawa Islamiyah, Vol. 6 Page 213