Riyad as-Salihin, Book 18, Hadith 1710 (In-Book) ⓘ
Buraidah (May Allah be pleased with him) reported: The Messenger of Allah 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."[Abu Dawud].
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" . ((رواه أبو داود))