Hadith 5304
عَنْ ثَابِتِ بْنِ الضَّحَّاكِ رَضِيَ اللَّهُ عَنْهُ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَالَ وَمَنْ حَلَفَ بِمِلَّةٍ سِوَى الْإِسْلَامِ كَاذِبًا فَهُوَ كَمَا قَالَ
It is narrated from Sayyiduna Thabit bin Dhahak (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: And whoever swears by a religion other than Islam, while he is lying, then he will become as he has said.
Hadith 5305
عَنِ ابْنِ بُرَيْدَةَ عَنْ أَبِيهِ رَضِيَ اللَّهُ عَنْهُ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ مَنْ حَلَفَ أَنَّهُ بَرِيءٌ مِنَ الْإِسْلَامِ فَإِنْ كَانَ كَاذِبًا فَهُوَ كَمَا قَالَ وَإِنْ كَانَ صَادِقًا فَلَنْ يَرْجِعَ إِلَى الْإِسْلَامِ سَالِمًا
It is narrated from Sayyiduna Buraidah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: Whoever swears an oath that he will be free from Islam, if he is lying, then he will become as he said; and if he is truthful, then he will not return safely to Islam.