his schemes, and that he should not be given any authority in Muslim lands except within the limits of the job for which he was hired. He must hold no power over the Muslims—indeed, not even over a single Muslim—for authority must remain in the hands of the Muslims over them.
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Rulings on Apostasy

Question: What is the ruling on a person who left Islam and then returned to it? Must he make up the obligatory acts of worship he missed—such as pilgrimage, fasting, and prayer—or is his repentance and return to Islam sufficient so that he starts anew?

Answer: The sounder of the two scholarly views is that when an apostate repents to Allah and re-enters Islam—turning back to Him in sincere repentance—he does not have to repeat the acts of worship he performed before his apostasy. Allah, Exalted is He, has made the nullification of deeds by apostasy conditional upon a person dying in that state. The Most High says: “Whoever among you turns back from his religion and dies while he is a disbeliever—such people’s deeds have become void in this world and the Hereafter, and they are the companions of the Fire; they will abide therein forever” (al-Baqarah 2:217). Thus the verse stipulates that for one’s deeds to be invalidated, he must persist in apostasy until death.

By implication, the verse shows that if he repents before death, the deeds he performed prior to his apostasy remain valid and, Allah willing, are accepted and sufficient.