Buraidah (May Allah be pleased with him) reported:
The Messenger of Allah ﷺ 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 ﷺ : "من حلف فقال: إني بريء من الإسلام، فإن كان كاذبًا، فهو كما قال، وإن كان صادقًا، فلن يرجع إلى الإسلام سالمًا". ((رواه أبو داود))