The Messenger of Allah ﷺ said: 'Whoever takes an oath to follow a religion other than Islam, telling a deliberate lie, he will be as he said.'"  

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ حَلَفَ بِمِلَّةٍ سِوَى الإِسْلاَمِ كَاذِبًا مُتَعَمِّدًا فَهُوَ كَمَا قَالَ  

"If that happens, I will be a Jew." The Messenger of Allah ﷺ said: 'That is guaranteed."  

سَمِعَ النَّبِيُّ ﷺ رَجُلاً يَقُولُ أَنَا إِذًا لَيَهُودِيٌّ فَقَالَ رَسُولُ اللَّهِ ﷺ وَجَبَتْ  

the Messenger of Allah ﷺ said: "Whoever says: 'I have nothing to do with Islam,' if he is lying then he is as he said, and if he is telling the truth, his Islam will not be sound."  

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ قَالَ إِنِّي بَرِيءٌ مِنَ الإِسْلاَمِ فَإِنْ كَانَ كَاذِبًا فَهُوَ كَمَا قَالَ وَإِنْ كَانَ صَادِقًا لَمْ يَعُدْ إِلَيْهِ الإِسْلاَمُ سَالِمًا