وعنه قال: قال رسول الله صلى الله عليه وسلم: «من حلف فقال: إني بريء من الإسلام، فإن كان كاذبًا، فهو كما قال، وإن كان صادقًا، فلن يرجع إلى الإسلام سالمًا»
The Messenger of Allah (sallallahu alayhi wa sallam) said, “If anyone swears that in such and such case he will be free from Islam and afterwards he turns out to be a liar, he will be as he has sworn; but if he is speaking the truth, he will not revert safely to Islam.”.
Riyad as-Salihin 1710, Book 18, The Book of the Prohibited actions, Hadith 200. 1 min read